In a large skillet, heat olive oil over medium heat. Add onions and garlic. Sauté until golden.
¼ cup olive oil, 1 medium yellow onion, 2 cloves garlic
Remove onions and garlic from skillet. Add the following to the skillet in layers, top each layer with some of the onions and garlic and salt and pepper to taste:+ bell peppers+ eggplant+ zucchini+ tomatoesDrizzle the top with 2 tablespoons olive oil.
3-4 medium bell peppers, any color, 1 medium eggplant (see note), 3 medium zucchini, 3-4 medium tomatoes, salt and pepper, 2 tablespoons olive oil
Reduce heat to very low, cover and cook for 35 minutes. Remove lid and cook for another 5-10 minutes to cook off some of the liquid.