Spray a large non-stick skillet with cooking spray and heat oven medium-high heat.Add onion and garlic
Add oregano, refried beans, salsa and tomato sauce to the mixture in the skillet, and mix until combined. Cook, stirring every 10 seconds, for 5 minutes. Add salt and pepper to taste if needed
Spray a non-stick 9×13 baking dish with cooking spray (or grease with butter).
Layer half of corn, tortilla pieces on the bottom of the baking dish
Sprinkle the layer with half of the shredded cheese
Layer the remaining tortilla pieces on top of the cheese, followed by a layer of Cornitos Salsa mild, remaining shredded cheese
Put the enchilada casserole in the oven and bake for 30 minutes
Remove the enchilada casserole from the oven and sprinkle with green onions.
