While a burrito is a hearty meal perfect for filling you up, it doesn't mean it's unhealthy. The black beans alone pack tons of plant-based protein, fiber, and several vitamins and minerals. Combine that with various micronutrients within the butternut squash, bell pepper, and onion for an impressive meal. Top that off with the heart-healthy fats and antioxidants in avocado, and you have a nutritionally impressive (and crowd-pleasing) meal.