The base of quinoa, roasted tomatoes, and mozzarella holds up to any combo you’d order up from your local pizzeria. Quinoa is a complete protein all by itself, so this is a great dish to pile on the veggies. We use mushrooms, onions, and green peppers, but you can customize this bowl based on your favorite toppings: Italian sausage and red peppers, artichoke hearts and sautéed spinach, or even black olives and pepperoni.