Step 1: Cook the Chicken: Start by placing the chicken breasts in a large pot and covering them with water. Sprinkle in the salt and bring the water to a boil. Reduce the heat and let it simmer for about 15-20 minutes or until the chicken is cooked through and tender. Once done, remove the chicken from the pot and let it cool slightly before shredding it with two forks.
Step 2: Prepare the Casserole Mixture: In a mixing bowl, combine the shredded chicken, black pepper, 6 oz of the shredded Mexican cheese, sour cream, and the diced green chilis (with their juice). Mix everything together until well combined. This mixture should be creamy and packed with flavor.
Step 3: Assemble the Casserole: Preheat your oven to 350°F (175°C). In a casserole dish, spread the chicken mixture evenly. Sprinkle the remaining 2 oz of shredded Mexican cheese on top. This will create a deliciously cheesy crust as it bakes.
Step 4: Bake the Casserole: Place the casserole dish in the preheated oven and bake for about 25-30 minutes or until the cheese is melted and bubbly. The edges may start to turn golden brown, which is a sign that your casserole is ready.
Step 5: Add Fresh Toppings: Once baked, remove the casserole from the oven and let it cool slightly. Top it with diced avocado, roma tomato, and chopped cilantro for a fresh, vibrant finish. These toppings not only add flavor but also a beautiful presentation to your dish.