Step-by-Step Instructions:
Preheat the grill to medium-high heat.
- Toss the asparagus with olive oil, salt, and pepper.
- Grill the asparagus for 5-10 minutes, turning occasionally, until they are tender and have char marks.
- Remove from the grill and garnish with lemon zest.
- Optionally, sprinkle with grated Parmesan cheese before serving.