Prep Your Pot: Start by lightly coating your slow cooker with non-stick spray for easy cleanup.
Layer the Chicken: Place the chicken breasts evenly at the bottom of your slow cooker.
Add the Flavor: Pour in the enchilada sauce, diced tomatoes, green chiles, and taco seasoning. Give it a gentle stir to mix everything well.
Slow Cook Magic: Cover your slow cooker and let it cook on High for 3-4 hours, or on Low for 4-6 hours, until the chicken is super tender and easily shreddable.
Shred the Chicken: Carefully remove the tender chicken and shred it using two forks.
Return & Combine: Return the shredded chicken back to the slow cooker. Gently mix in half of the shredded cheese, the drained black beans, and the sweet corn kernels.
Tortilla Time: Fold in the tortilla strips, stirring everything together just until combined.
Final Cheese Layer: Sprinkle the rest of the cheese evenly over the top of the casserole.
Melt & Serve: Cover again and cook for another 20-30 minutes, or until the cheese is wonderfully melted and bubbly, and the casserole is heated through. If using, stir in the light cream cheese during this final cooking stage for extra richness.
Garnish & Enjoy: Finish with a sprinkle of fresh cilantro and serve hot!