Preheat the grill by selecting the Grill function and setting the temperature to medium-high. Allow the grill to preheat for a few minutes.
Wash the zucchini thoroughly and trim off the ends. Cut the zucchini into desired shapes like slices, rounds, or spears. Keep in mind that thinner slices will cook faster than thicker ones.
Drizzle the zucchini with olive oil, ensuring all pieces are lightly coated. Sprinkle salt, black pepper, and any additional seasonings you prefer over the zucchini, and toss gently to distribute the seasonings evenly.
Place the seasoned zucchini directly on the preheated grill grates. Close the grill lid and cook for about 3-4 minutes per side, or until grill marks appear and the zucchini is tender-crisp. Flip the zucchini halfway through the cooking time for even browning.
Once the zucchini is cooked to your desired level of tenderness, carefully remove it from the grill using tongs or a spatula. Transfer the grilled zucchini to a serving platter or plate.
For added flavor, sprinkle some freshly grated Parmesan cheese, chopped herbs (such as basil or parsley), or a squeeze of lemon juice over the grilled zucchini before serving.
Serve the grilled zucchini as a tasty side dish alongside your favorite grilled meats or as a component in salads, sandwiches, or pasta dishes. It can also be enjoyed as a healthy and delicious snack.