Pull out and measure all of the ingredients.
Preheat oven to 425 degrees. Line a casserole dish with cooking spray and set aside.
In a medium saucepan, over medium heat, add oil and wait until it shimmers or a drop of water flicked in it dances. Add tomatoes, onions and garlic.
Add chicken, broth and cilantro. Stir until mixture is well-blended. Simmer between 7 to 10 minutes.
Season with salt and pepper to taste.
Sprinkle approximately half of the corn chips across the bottom of casserole dish.
Next, add half of the chicken mixture on top of the chips.
and then half of the cheese.
Repeat with the remaining chips.
and then cheese.
Bake until hot and cheese is melted and starting to brown; about 15 minutes.
Feel free to broil for a moment or two to brown the cheese as much as you like!
Allow chicken to rest for at least 5 minutes; if not 10.
Serve with sour cream, if desired, Enjoy every bite.