Place sliced zucchini in 14x9 shallow baking dish. Sprinkle with salt, pepper, garlic powder, sweet basil and oregano.
Place tomatoes on top of zucchini and season the same as zucchini.
Place onions on top of tomatoes and season as needed.
Layer slices of American cheese on onions followed by bacon slices.
*optional - cook bacon till medium done before putting on casserole.
Cook 350 degree uncovered 45-60 minutes