Trim the woody ends from the asparagus spears by bending them gently until they snap naturally at the point where the tender part begins—this ensures you keep the most edible portion. While the asparagus rests, preheat your grill to medium-high heat (around 400°F if using a gas grill), giving it about 5-10 minutes to reach temperature and the grates to get hot enough to create those beautiful char marks.

In a bowl or on a large plate, toss the trimmed asparagus with the extra virgin olive oil, kosher salt, and freshly ground black pepper until each spear is evenly coated. I like to use my hands for this step—it ensures better coverage than trying to mix in a small pan, and you can feel any dry spots that need more oil. The light coating of oil is crucial for preventing sticking and developing flavor through the grilling process.

Place the seasoned asparagus directly on the preheated grill grates, arranging them perpendicular to the grates so they don't fall through. Grill for about 10 minutes total, turning the spears every 2 minutes with tongs or a spatula to ensure even cooking and char development on all sides. The asparagus is done when it's tender-crisp with lightly charred, caramelized spots—you should be able to pierce it easily with a fork but it shouldn't be limp. I find that rotating frequently prevents any single side from burning while allowing those flavorful charred edges to develop.

Transfer the grilled asparagus to a serving platter while still warm. Immediately top with the freshly grated Parmesan cheese and lemon zest, tossing gently to combine. The residual heat will slightly soften the cheese and allow the lemon zest's oils to bloom, creating a bright, savory finish. Serve right away while the asparagus is still warm and the cheese is at its creamiest.