Place the onions, garlic, diced canned tomatoes, thyme, ¼ teaspoon of salt and ¼ teaspoon of pepper and crushed red pepper in a 10-inch oval oven-safe baking dish and stir to combine.,
STEP 3
Arrange alternating slices of eggplant, zucchini, yellow squash and red bell pepper, starting at the outer edge of the dish and working concentrically towards the center. Overlap slices a little to display colors.,
STEP 4
Drizzle the vegetables with the olive oil, and season with oregano and the remaining salt and pepper.,
STEP 5
Cover the baking dish with aluminum foil and bake in the preheated oven for 45 minutes. Uncover and cook for 15 more minutes or until the vegetables are tender.,
STEP 6
Drizzle with the red wine vinegar and add the parmesan cheese on top, if desired.