Pre-heat oven 350 degrees
Lightly grease 6”X9” baking dish (can use 8”X8” square) and set aside.
In a mixing bowl, add crushed tomatoes, oil, garlic, basil, herbs de Provence, salt, pepper and chili powder. Stir to combine. Pour sauce into prepared baking pan and spread evenly on the bottom.
Stack the vegetable slices in alternating pattern (eggplant, onion, zucchini, tomato) repeating until you’ve covered the bottom of the pan and used all the slices. Brush the top of the vegetables with olive oil.
Please in middle of oven and bake for 1 hour. Serve warm.