Preheat the oven to 350°F.
In a large skillet over medium heat, sauté the onion in olive oil until tender, about 5 minutes. Add the chicken, chicken broth, and Better Than Bouillon base. Cook until the chicken is no longer pink. Remove the chicken with a slotted spoon and set it aside, leaving the juices in the skillet.
2 tbsps olive oil, 1 cup diced white onion, 3 cups cubed boneless, skinless chicken breast , 1/2 cup low-sodium chicken broth, 1 heaping tbsp Better Than Bouillon chicken base
Stir the cream cheese, Greek yogurt, salsa verde, enchilada sauce, green chiles, cumin, garlic powder, and lime juice into the skillet. Cook until the mixture is smooth and creamy. Return the chicken to the skillet and heat through.
4 oz cream cheese , 1 cup Greek yogurt , 1/4 cup salsa verde, 1 (10 oz) can green enchilada sauce, 1 (4 oz) can green chiles, 1/4 tsp ground cumin, 1/2 tsp garlic powder, juice of one lime
In a 9x9 baking dish, layer cut-up tortillas to cover the bottom (about 4–5 tortillas per layer). Alternate layers of tortillas, the creamy chicken mixture, and shredded cheese, repeating for three layers and ending with cheese on top.
15 corn tortillas, cut into 4's, 8 oz shredded cheddar or Monterey Jack cheese
Place the baking dish on a baking sheet to catch any spills. Bake for 30 minutes, or until the cheese is melted and bubbling.
Let the casserole cool for 15–20 minutes before slicing and serving. Top with cilantro, sour cream, avocado, and hot sauce if you like.
1/4 cup cilantro to garnish, optional, avocado to garnish, optional, sour cream, my favorite hot sauce, optional