Preheat outdoor grill to med/high.
Wash zucchini, pat dry, and cut off ends.
Cut zucchini into quarter wedges lengthwise.
Place zucchini wedges into large zip lock baggie. Add olive oil, Italian seasoning, garlic powder, salt and pepper. Squish bag around to distribute oil and spices on all zucchini wedges.
Place in refrigerator until ready to grill (or grill immediately).
Clean grill grates using grill scraper. There is no need to oil grill grates since the oil is already on the zucchini wedges.
Place zucchini onto grill cut side down. Cook over med/high heat for 3-5 minutes. Turn zucchini and cook for another 3-5 minutes.
Remove from heat and top with shredded parmesan.
Enjoy!
*I found that 10 minutes cooked the zucchini perfectly, but adjust as needed depending on grill heat and desired tenderness.