Preheat oven to 350.
Melt butter in skillet over medium heat. Add chicken breast and season with a little bit of salt and pepper. Cook chicken until golden brown (about 10-15 minutes). Remove from heat. Shred with forks or cut into small pieces with a knife. Set chicken aside.
In the same skillet, pour 2 tbsp olive oil and spread in pan over medium heat. Add onions and bell peppers to skillet. Saute for 5-8 minutes (or until they’re all fairly soft). Add garlic and saute for an additional 2 minutes. Add soups, sour cream, diced tomatoes, cumin, chile powder, and cooked chicken to skillet. Stir until everything is well-blended. Remove from heat.
Lightly spray the bottom of a 9x13 baking dish.
Tear up 4 of the tortillas into smaller pieces and spread evenly across the bottom of the dish. Spread about 1/3 of the chicken mixture across the tortillas, and then 1/3 of the cheese evenly across the chicken mixture.
Repeat step 4 twice more (layering torn-up tortillas, chicken mixture, and cheese until you run out of ingredients). You should end up having three layers of torn-up tortillas, chicken mixture, and cheese.
Place pan in oven and bake for 30 minutes uncovered.
Enjoy with some fresh and zesty side dishes!