This taco is filled with pork, mashed sweet potatoes, and Brussels sprouts leftover from another meal. Adding southwestern ingredients punches up these flavors.
Preheat oven to 400°. Wrap pork in foil, and heat for 15 minutes.
Meanwhile, cook next 4 ingredients (through garlic) in a skillet, stirring, for 7 minutes or until hot. Add vinegar.
Blend sweet potatoes with chipotle chiles in a separate bowl.
Slice pork thinly. Fill taco shells with mashed sweet potatoes, sprout mixture, pork, and red onion. Serve with sour cream and lime wedges.