Preheat oven to 350 degrees Place olive oil into a 12 inch cast iron skillet over medium heat. Add onions and cook for 5 minutes, stirring often until softened. Add chicken, beans, olives and cut up tortillas. Stir to combined.
Place salsa and cream into a medium bowl and add to skillet, stirring to combine. Stir in cumin, salt and pepper. Top with shredded cheese and bake for 20-25 minutes, until cheese is melted.