Using 12 inch saute pan, heat olive oil over medium heat and saute zucchini, red pepper, onion, garlic, salt and pepper for about 15 minutes or until veggies are tender.
In very large bowl whisk together eggs, mayonnaise, Romano/parmesan, and 1 cup mozzarella.
Add veggie mixture to egg mixture in bowl. Stir well.
Spread veggie/egg mixture evenly in baking dish. Top with remaining mozzarella then cracker crumbs.
Bake uncovered for 20 - 25 minutes. Top should be lightly browned and a knife inserted near middle should come out clean. Let stand 10 minutes before serving.