Preheat your oven to 350 degrees F.
Butter a casserole dish and set it aside until needed.
Add the cheddar cheese and Colby-Jack cheese to a large bowl and mix to combine the cheeses. Set aside until needed.
Heat a large skillet or Dutch oven over medium heat.
Add the olive oil, onions, bell peppers, and jalapeno peppers to the skillet.
Stir to combine. Cook the vegetables until tender, about 5 minutes.
Add the sea salt, black pepper, garlic powder, and chili powder to the pan. Stir to combine.
Add the chicken and rotelle tomatoes to the pan. Stir to combine.
Add the cream of mushroom soup and cream of chicken soup to the mixture.
Stir together to combine and simmer for 5 minutes over medium-low heat..
Remove the pan from heat.
Layer the corn tortillas across the bottom of the casserole dish; try not to overlap the tortillas too much. (Alternatively, you can rip the tortillas apart into smaller pieces to line the dish)
Add a layer of the chicken mixture over the corn tortillas.
Sprinkle half of the cheese over the top of the chicken mixture.
Add another layer of the corn tortillas over the cheese.
Repeat the chicken layer and top with the remaining cheese
Place the casserole dish on the center rack of the preheated oven and bake for 30-35 minutes until bubbly and the cheese has fully melted.
Remove from the oven and allow it to rest for 5-10 minutes so the casserole can set.
Use a sharp knife to cut into squares and serve hot