Ingredients for Topping: 1 onion, chopped 2 cloves garlic, finely chopped 1 4-oz can of mushrooms, drained ½ green pepper, chopped ½ red pepper, chopped 1 to 2 small zucchini, sliced and cut in circles 1 leek, white and green parts, sliced (opt) 3-4 tablespoons...
