Preheat the oven to 180 (400°f). Finely dice the onion and mince the garlic. Saute both in a skillet with olive oil until softened ( about 5 mins ).

While the onion and garlic are sauteing thinly slice the rest of the vegetables.

Spray the inside of an 8x8 square or round baking dish with non-stick spray. Spread the softened onion and garlic in the bottom of the dish. Place the thinly sliced vegetables in the baking dish vertically, in an alternating pattern. Sprinkle generously with salt & pepper and thyme.

Cover the dish with foil and bake for 30 mins. Remove the foil, top with cheese and bake for another 15-20 mins or until the cheese is golden brown.