Start by washing and cutting your chicken, onions, and tortillas. Open the cans of beans and chilies. I like to have everything ready so assembly is quick and smooth.
Place the chicken breasts, enchilada sauce, green chilies, black beans, and diced onions into the slow cooker. This base will absorb all the flavors while cooking.
Cover the crockpot and cook on high for 4–5 hours or low for 8 hours. The chicken should be fully cooked and easy to shred. I usually test with a fork to make sure it’s tender.
Once cooked, shred the chicken directly in the crockpot using two forks. This allows the chicken to soak up the delicious sauce. Stir everything well to combine.
Mix in the cut tortilla strips and half of the shredded cheese. Top with the remaining cheese and cover for an additional 30 minutes to melt the cheese perfectly.
Once the cheese is melted, serve with fresh cilantro, avocado slices, jalapeños, and a dollop of Greek yogurt or sour cream. I love how the toppings make the dish look restaurant-quality.