Brown onions and meat. Add taco seasoning, chili powder, tomato sauce, and black beans. Mix.
In a separeate bowl, mix cottage cheese and eggs.
Layer ingredients in a 9×13 baking dish:Meat sauce/ cottage cheese & egg/ four tortillas (spread entirely over dish)/ 4 oz cheese/ repeat.
Bake at 375 degreeze for one hour. Cover with foil for the first 45 minutes.
Freeze in aluminum tins, covered well. If thawed cook as above, if frozen cook until bubbling.