Preheat oven to 350ºF.
Season the chicken breast and cook on medium-high heat in a pan with avocado oil for 4-5 minutes on each side. Let the chicken rest on a plate.
In the same pan, add the sliced peppers and onions. Sauté and season to taste with the same seasonings as the chicken.
After 10 minutes, shred the chicken. In a large bowl, combine the shredded chicken, 1 cup enchilada sauce and a generous pinch of salt and pepper. Mix together and taste.
Lightly pan fry the tortillas on each side until softened, but not hardened. The tortillas need to be pliable to roll. This pan frying step is crucial for non-soggy enchiladas!
Assemble the enchiladas by filling each tortilla evenly with the shredded chicken mixture and a sprinkle of shredded cheese.
Roll the tortillas tightly to close and place in large baking dish seam side down. Pour the remaining 1 cup of enchilada sauce over the tortillas and top with a layer of shredded cheese.
Bake for ~20 minutes until the cheese is melted and bubbly. Broiling for 1 minute at the end gets the cheese super melty and bubbly, but be careful to not over-broil.
Serve immediately or let cool and refrigerate for up to 4 days. Garnish with sour cream, pico de Gallo, cilantro & a lime wedge.