Cook the ground beef in a skillet, adding salt and black pepper and breaking up the chunks with a wooden spoon.
Remove from the heat once no pink remains.
Preheat the oven to 350°F.
Heat the enchilada sauce until it bubbles, then take it off the heat.
Dip a corn tortilla in the sauce then put it on an oven-safe dinner plate.
Add some of the beef, cheese and onion.
Repeat twice more so you end up with a stack of 3 tortillas with fillings in between. Have cheese as the final layer.
Repeat until you have 4 x stacks of 3 tortillas with fillings, and then bake for 10 minutes or until the cheese melts.
Meanwhile, fry some eggs if you want those on top.
Enjoy!