Pan fry the diced potatoes, salt, pepper and garlic powder in a little shortening, vegetable oil or rendered bacon fat until browned and nearly done; add onions and peppers and continue to cook until potatoes are done and onions and peppers are tender. (or you can fry up a pre-packaged bag of O'Brian potatoes if desired).
Remove from heat and stir in the meat and scrambled eggs.
Cut the tortillas in half; lay them in a 9 x 13 rectangular pan, placing the cut edges square to the side of the pan, over lapping as needed.
Spread a 1/3 of the meat, potato and egg mixture on top of tortillas.
Pour 1/2 cup of the sauce over the meat, potatoes and egg.
Sprinkle on 1/2 cup of the cheese.
Repeat layer once more.
Add one more layer by adding tortillas and meat, potatoes and egg.
Top with another layer of tortillas; pour last cup of sauce over the tortilla covered casserole.
Sprinkle with remaining cheese.
Bake in 350 degree oven until hot and the cheese is melted.