Ingredient Substitutions: Ground turkey or chicken can be used in place of ground beef for a lighter option. For a vegetarian alternative, try using black beans or a plant-based meat substitute. Optional Variations: Get creative by adding sliced jalapeños for a spicy kick or sautéed bell peppers and onions for added flavor. Storage: Leftovers can be stored in an airtight container in the fridge for up to 3 days. Reheat in a skillet over medium heat to maintain crispiness, or use the microwave for a quick warm-up.