Layer of peeled zucchini
Layer of sliced onions
Layer of sliced tomatoes
Parmesan cheese to cover
Salt, pepper & basil or oregano to sprinkle on each layer

Grease pan of the size of your choice. Amounts of ingredients will depend on the size of the pan. Layer vegetables. Bake at 350 degrees for 45 minutes. Add cheese and bake another 15 minutes.