Start by washing and slicing the zucchini into even rounds or spears. Make sure they are of similar thickness for even cooking.
In a bowl, mix olive oil, minced garlic, lemon zest, lemon juice, and chopped fresh basil if desired. Season with salt and pepper to taste.
Toss the zucchini slices or spears in the marinade, ensuring they are coated evenly. Allow them to marinate for about 15-30 minutes for maximum flavor.
Preheat your grill to medium-high heat. Make sure the grates are clean and lightly oiled to prevent sticking.
Place the marinated zucchini on the grill and cook for a few minutes on each side until they have grill marks and are tender-crisp.
Remove the grilled zucchini from the heat and serve immediately. Garnish with fresh basil and a drizzle of lemon juice if desired.
The Absolute Best Grilled Zucchini is a flavorful delight that makes a perfect side dish for any summer meal or barbecue.