Combine first 8 ingredients in a small bowl, and use it to coat the chicken breast all over.
Place the seasoned chicken, diced tomatoes, and green chiles in a slow cooker. Cook for 3 hours on high heat or 7 hours on low heat. Shred chicken with two forks, and return to the slow cooker. Add shredded cheese to top layer of chicken, and let cook for 30 more minutes.
Preheat oven to 400 degrees. Place the taco shells in the baking dish standing up.
Bake for 6-8 minutes, until golden.
Spoon 1 tablespoon of refried beans to the base of each taco shell. Add chicken and cheese mixture evenly into shells, shaking off excess liquid. Top each taco generously with shredded cheese and your favorite ingredients! I like sour cream, shredded lettuce, salsa, diced onion, and cilantro.
Recipe by Ally's Cooking at https://allyscooking.com/2016/07/23/cheesy-crunchy-baked-chicken-tacos/