If you're looking for an innovative twist on traditional tacos, try making sweet potato and black bean tacos. Roast diced sweet potatoes with spices like cumin, paprika, and chili powder until tender and caramelized. Mash some of the black beans and mix them with the sweet potatoes for a creamy texture. Fill corn tortillas with the sweet potato and black bean mixture, then top it with avocado, salsa, and cilantro. These vegetarian tacos are not only delicious but also packed with fiber, vitamins, and minerals.