Preheat oven to 400 degrees.
Spray a 8-inch square casserole dish or pan with non-stick spray.
Assemble vegetables in a pattern, in rows and drizzle olive oil on top.
Sprinkle with salt and pepper.
Bake for about 30 minutes, till vegetables are tender.
Top with Parmesan cheese and set under broiler till cheese melts and browns slightly.