- Preheat oven to 450 degrees F (230 degrees C). Lightly grease a 9x13 inch baking dish.
- Combine the zucchini, tomatoes, onion, garlic, and red pepper flakes in the prepared baking dish. Drizzle with the olive oil, season with salt and pepper, and mix well.
- Place in preheated oven. Roast until vegetables are tender and slightly golden, about 18 minutes. Remove from oven; sprinkle with the Parmesan cheese and basil.