For serving: gluten free tortillasI like corn tortillas, Greek yogurt or sour cream, cheese
Place peppers, onions, chipotle chile, and garlic in the slow cooker insert and toss. If necessary, cut meat to fit into your slow cooker. Place meat on top of the vegetables and top with salsa. Cook on low for 8 hours or high for 4 hours.
Transfer meat to a cutting board and shred. Remove vegetables with a slotted spoon and toss reserved liquid with the meat.
To serve, place meat and vegetables in tortillas and top with desired toppings.