1: Preheat the oven to 400°F.
2: Combine diced zucchini, yellow squash, bell pepper, cherry tomatoes, Italian seasoning, garlic powder, black pepper, Parmesan cheese, and olive oil in a large bowl.
3: Toss until the vegetables are evenly coated with the seasoning.
4: Spread the mixture evenly on a baking sheet.
5: Roast in the oven for about 15 minutes or until the vegetables are tender.