This recipe for slow cooker chicken fajitas is a delicious and easy way to enjoy a Mexican-inspired meal at home. Simply combine chicken breasts, bell peppers, onions, and a blend of spices in your crock pot, and let it cook on low for 6-8 hours. Serve the tender, flavorful chicken and veggies in warm tortillas with your favorite toppings, such as salsa, guacamole, and sour cream.