In a large skillet over medium heat, heat the olive oil. Add the garlic and sauté for 2 minutes. Add the zucchini, bell pepper, onion, oregano, basil, and red pepper flakes, if using, and sauté for an additional 5 minutes.
Add the mozzarella cheese, parmesan cheese, salt, and pepper, and cook until the cheese is melted, stirring occasionally. Remove from the heat.
Spray a 9-inch square baking dish with cooking spray. Spread the vegetable mixture into the baking dish and sprinkle with the breadcrumbs.
Bake for 20 minutes, or until the top is golden brown.
Remove from the oven and let cool for 5 minutes before serving.
Interesting Facts
Veggie squares are a great way to sneak in extra vegetables into your diet.
Veggie squares can be served as an appetizer, snack, or side dish.
These veggie squares can be frozen and reheated for an easy and quick meal.