Sweet potato and black bean enchiladas are a hearty and satisfying option. Start by roasting sweet potatoes until tender. In the food processor, blend together black beans, onions, garlic, and spices until smooth. Mix in the roasted sweet potatoes and roll up the mixture in tortillas. Top with enchilada sauce and cheese, then bake until the cheese is melted and bubbly. These enchiladas are packed with flavor and make a great vegetarian dinner.