Garlic Grilled Vegetables with Asparagus

If you ask me, grilled vegetables are one of the best things about summer cooking.

This colorful side dish brings together asparagus, bell peppers, zucchini, and mushrooms with a simple marinade that lets the vegetables shine. The balsamic vinegar and herbs add a tangy, savory kick that makes everything taste even better.

Everything gets tossed in a quick marinade with olive oil, garlic powder, and fresh lemon zest before hitting the grill. The high heat gives the vegetables a nice char while keeping them tender on the inside.

It’s an easy-to-make dish that works with any summer meal, perfect for backyard barbecues or weeknight dinners.

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What Kind of Asparagus Should I Use?

When picking asparagus for grilling, you’ll want to look for medium to thick spears rather than the super thin ones. The thicker spears hold up much better on the grill and won’t fall through the grates or turn mushy. Fresh asparagus should have tight, closed tips and firm stalks – if they’re bendy or the tips look dried out, they’re past their prime. Don’t forget to snap or cut off the woody ends at the bottom before grilling, usually about an inch or two from the base, and you’ll be all set for perfectly grilled asparagus.

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Options for Substitutions

This grilled veggie recipe is super forgiving – feel free to mix things up based on what you have:

• Balsamic vinegar: If you’re out of balsamic, try red wine vinegar or lemon juice instead. They’ll give you that tangy kick, just with a slightly different flavor profile.
• Fresh herbs: Use whatever herbs you have on hand – basil, thyme, oregano, or rosemary all work great. Dried herbs work too, just use about 1 teaspoon instead of the tablespoon since dried herbs are more concentrated.
• Bell peppers: Any color bell pepper works here, or you can swap in poblano peppers for a mild kick or sweet mini peppers for something different.
• Zucchini and yellow squash: These are pretty interchangeable – use all zucchini or all yellow squash if that’s what you’ve got. Eggplant also grills nicely and can replace either one.
• Green beans: Snap peas or trimmed broccolini make good stand-ins for green beans and grill up just as nicely.
• Asparagus: This is the star of the dish, so I’d recommend keeping it. But if asparagus isn’t in season, thick scallions or halved baby bok choy can give you that similar grilled green veggie experience.

Watch Out for These Mistakes While Grilling

The biggest mistake when grilling vegetables is cutting them too thin, which causes them to fall through the grates or burn before they cook through – aim for at least 1/2-inch thickness for zucchini and squash, and keep asparagus spears whole.

Another common error is overcrowding your grill or grill basket, which creates steam instead of those nice char marks you’re looking for, so give your vegetables some breathing room and grill in batches if needed.

Don’t skip the marinating step or rush it – letting your vegetables sit in that oil and vinegar mixture for at least 15 minutes before grilling helps them absorb flavor and prevents sticking.

Finally, resist the urge to constantly flip your vegetables, as leaving them undisturbed for the full 2 minutes per side allows proper caramelization and those tasty grill marks to develop.

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What to Serve With Grilled Vegetables?

Grilled vegetables are perfect alongside just about any protein you’re cooking on the grill – think chicken breasts, steak, or even grilled salmon. I love serving them over a bed of quinoa or couscous to soak up all those tasty juices from the balsamic marinade. They also make a great side for pasta dishes, especially if you toss them with some penne and a drizzle of extra olive oil and parmesan. If you want to make it a complete meal on its own, try adding some grilled halloumi cheese or chickpeas for extra protein.

Storage Instructions

Store: Grilled vegetables keep really well in the fridge for up to 4 days in an airtight container. They’re great to have on hand for quick meals throughout the week – I love tossing them into pasta, grain bowls, or just eating them cold as a side dish.

Freeze: You can freeze these grilled veggies for up to 2 months, though the texture will be a bit softer when thawed. Spread them on a baking sheet to freeze individually first, then transfer to a freezer bag so they don’t stick together.

Serve: These are delicious served at room temperature or warmed up. If you want them warm, just heat them in a skillet over medium heat for a few minutes, or pop them in the oven at 350°F until heated through.

Estimated Nutrition

Estimated nutrition for the whole recipe (without optional ingredients):

• Calories: 375-425
• Protein: 10-12 g
• Fat: 28-32 g
• Carbohydrates: 38-44 g

Ingredients

For the dressing:

• 4 tbsp olive oil
• 1 1/2 tbsp balsamic vinegar
• 3/4 tsp salt
• 1/2 tsp garlic powder
• 1/2 tsp ground black pepper
• 1 tbsp chopped fresh herbs
• 1/2 tsp dried oregano
• 1 tsp fresh lemon zest

For the vegetables:

• 2 large bell peppers (cut into 1-inch wide strips)
• 2 medium zucchini (sliced into 1/2-inch thick rounds)
• 1 large yellow summer squash (sliced into rounds)
• 2 cups fresh green beans (ends trimmed)
• 2 cups cremini mushrooms
• 15-18 asparagus spears (tough woody ends snapped off)
• 1 large red onion (cut into thick wedges)

Step 1: Prepare the Marinade and Vegetables

• 4 tbsp olive oil
• 1 1/2 tbsp balsamic vinegar
• 3/4 tsp salt
• 1/2 tsp garlic powder
• 1/2 tsp ground black pepper
• 1 tbsp chopped fresh herbs
• 1/2 tsp dried oregano
• 1 tsp fresh lemon zest
• 2 large bell peppers
• 2 medium zucchini
• 1 large yellow summer squash
• 2 cups fresh green beans
• 2 cups cremini mushrooms
• 15-18 asparagus spears
• 1 large red onion

While your grill preheats, whisk together olive oil, balsamic vinegar, garlic powder, salt, black pepper, dried oregano, fresh lemon zest, and chopped fresh herbs in a large bowl.

This creates your flavor base.

Meanwhile, prepare all vegetables: cut bell peppers into 1-inch wide strips, slice zucchini and yellow squash into 1/2-inch thick rounds, trim the ends from green beans, halve the cremini mushrooms, snap off the woody ends from asparagus spears, and cut red onion into thick wedges.

I like to keep vegetables relatively uniform in thickness so they cook at similar rates on the grill.

Step 2: Coat Vegetables and Organize by Cooking Method

• marinated vegetable mixture from Step 1

Pour the marinade mixture over all prepared vegetables and toss gently until everything is evenly coated.

Now separate your vegetables into three groups based on their cooking requirements: (1) quick-cooking delicate items—asparagus and green beans—which will go in a foil packet, (2) medium-cooking items—mushrooms and zucchini slices—which will go in a grill basket, and (3) sturdy vegetables—bell pepper strips, squash rounds, and red onion wedges—which will be grilled directly on the grates.

This organization ensures each vegetable reaches perfect tenderness at the right time.

Step 3: Grill Sturdy Vegetables First

• bell pepper strips from Step 1
• yellow summer squash rounds from Step 1
• red onion wedges from Step 1

Heat your grill to medium-high heat.

Once hot, place bell pepper strips, yellow squash rounds, and red onion wedges directly on the grill grates.

Cook for about 2 minutes per side until you see nice grill marks and the vegetables begin to soften.

These heartier vegetables need direct heat and will be ready in about 4 minutes total.

Transfer them to a serving platter and keep warm.

Step 4: Grill Delicate Vegetables in Foil Packet

• asparagus spears from Step 1
• fresh green beans from Step 1

Create a foil packet by tearing off a large sheet of heavy-duty foil.

Place the asparagus spears and green beans in the center, drizzle with any remaining marinade from the bowl, then fold the foil to create a sealed packet.

Place this on the grill grates at medium-high heat for 15-20 minutes.

I prefer foil packets for delicate vegetables because they steam gently inside and won’t fall apart through the grates.

Around the 12-minute mark, carefully open the foil (watch out for steam!) to check for tenderness.

Step 5: Grill Medium-Cooking Vegetables in Basket

• cremini mushrooms from Step 1
• zucchini slices from Step 1

While the foil packet is cooking, place the halved cremini mushrooms and zucchini slices into a grill basket (this prevents smaller pieces from falling through).

Set the basket on the grill grates at medium-high heat for 10-12 minutes, stirring every 3 minutes to ensure even cooking and prevent sticking.

The mushrooms will release moisture and develop a nice golden color, while the zucchini becomes tender with light charring.

Step 6: Combine and Serve

• grilled bell peppers from Step 3
• grilled squash from Step 3
• grilled red onion from Step 3
• grilled asparagus and green beans from Step 4
• grilled mushrooms and zucchini from Step 5

Once all vegetables are cooked through and tender, transfer them to a large serving platter.

Arrange them in an appealing pattern, combining all the grilled vegetables together.

Taste and adjust seasoning with additional salt and pepper if needed.

Serve immediately while still warm, allowing guests to enjoy the charred edges and tender interiors of each vegetable.

Garlic Grilled Vegetables with Asparagus

Delicious Garlic Grilled Vegetables with Asparagus recipe with step-by-step instructions.

Print Recipe Pin Recipe

Prep Time 10 minutes mins

Cook Time 25 minutes mins

Total Time 37 minutes mins

Servings 6 servings

Calories 400 kcal

Ingredients

  

For the dressing

• 4 tbsp olive oil
• 1 1/2 tbsp balsamic vinegar
• 3/4 tsp salt
• 1/2 tsp garlic powder
• 1/2 tsp ground black pepper
• 1 tbsp chopped fresh herbs
• 1/2 tsp dried oregano
• 1 tsp fresh lemon zest

For the vegetables

• 2 large bell peppers (cut into 1-inch wide strips)
• 2 medium zucchini (sliced into 1/2-inch thick rounds)
• 1 large yellow summer squash (sliced into rounds)
• 2 cups fresh green beans (ends trimmed)
• 2 cups cremini mushrooms
• 15-18 asparagus spears (tough woody ends snapped off)
• 1 large red onion (cut into thick wedges)

Instructions

 

• While your grill preheats, whisk together olive oil, balsamic vinegar, garlic powder, salt, black pepper, dried oregano, fresh lemon zest, and chopped fresh herbs in a large bowl. This creates your flavor base. Meanwhile, prepare all vegetables: cut bell peppers into 1-inch wide strips, slice zucchini and yellow squash into 1/2-inch thick rounds, trim the ends from green beans, halve the cremini mushrooms, snap off the woody ends from asparagus spears, and cut red onion into thick wedges. I like to keep vegetables relatively uniform in thickness so they cook at similar rates on the grill.
• Pour the marinade mixture over all prepared vegetables and toss gently until everything is evenly coated. Now separate your vegetables into three groups based on their cooking requirements: (1) quick-cooking delicate items—asparagus and green beans—which will go in a foil packet, (2) medium-cooking items—mushrooms and zucchini slices—which will go in a grill basket, and (3) sturdy vegetables—bell pepper strips, squash rounds, and red onion wedges—which will be grilled directly on the grates. This organization ensures each vegetable reaches perfect tenderness at the right time.
• Heat your grill to medium-high heat. Once hot, place bell pepper strips, yellow squash rounds, and red onion wedges directly on the grill grates. Cook for about 2 minutes per side until you see nice grill marks and the vegetables begin to soften. These heartier vegetables need direct heat and will be ready in about 4 minutes total. Transfer them to a serving platter and keep warm.
• Create a foil packet by tearing off a large sheet of heavy-duty foil. Place the asparagus spears and green beans in the center, drizzle with any remaining marinade from the bowl, then fold the foil to create a sealed packet. Place this on the grill grates at medium-high heat for 15-20 minutes. I prefer foil packets for delicate vegetables because they steam gently inside and won't fall apart through the grates. Around the 12-minute mark, carefully open the foil (watch out for steam!) to check for tenderness.
• While the foil packet is cooking, place the halved cremini mushrooms and zucchini slices into a grill basket (this prevents smaller pieces from falling through). Set the basket on the grill grates at medium-high heat for 10-12 minutes, stirring every 3 minutes to ensure even cooking and prevent sticking. The mushrooms will release moisture and develop a nice golden color, while the zucchini becomes tender with light charring.
• Once all vegetables are cooked through and tender, transfer them to a large serving platter. Arrange them in an appealing pattern, combining all the grilled vegetables together. Taste and adjust seasoning with additional salt and pepper if needed. Serve immediately while still warm, allowing guests to enjoy the charred edges and tender interiors of each vegetable.