The modern frozen pizza is a far cry from the tiny little cubed meat and cheese version you can pop in your microwave. High-end gourmet pizzas are now available on the frozen food aisle, in vegetarian and even vegan varieties. Antioxidant-rich marinara sauce on a vegan whole wheat crust is a great start. Then add everything from peppers to mushrooms and broccoli in the veggie department. Vegan pizzas will use either no cheese or a non-dairy cheese. They'll also feature pizzas with vegan "meats," which are typically soy-based products flavored to taste like the real thing.