Preheat the grill to medium-high heat
Wash the zucchini and trim the ends
Slice the zucchini lengthwise into planks or into thick rounds
Pat the zucchini dry
Brush the zucchini with olive oil
Season with salt and pepper
Add garlic powder, Italian seasoning, or paprika if desired
Place the zucchini directly on the grill grates
Grill for 2 to 4 minutes per side
Flip once grill marks appear and the zucchini softens
Remove from the grill when tender-crisp
Serve immediately