This easy pork burrito mixture can be cooked on the stovetop or in the slow cooker. Lean boneless pork shoulder or butt is perfect for these burritos. The pork is cooked until it's very tender and then seasonings are added. Spread some refried beans on the tortillas before you add the pork. Serve the burritos with cheddar or pepper jack cheese, sour cream, shredded lettuce, and chopped tomatoes or salsa. Or use your favorite toppings. See the tips and variations for freezing instructions.