Heat a large skillet with a little oil. When sizzling, place a corn tortilla in the oil for just a second to soften and remove to a paper towel. I place one side of the tortilla in oil, place the not oiled side up, repeat the process and put the oil side onto the unoiled previous tortilla. Sounds complicated, but not turning in the skillet and letting both sides into the oil helps with the tortillas holding together and to not fall apart...so basically your first tortilla is oil on the bottom, none on top but you'll top that with the oiled one, on and on. Set the tortillas aside.
Grate your cheese and chop your onions.
Cook your meat in a skillet with salt and pepper just until lightly browned.
Preheat your oven to 450 degrees. Get a large baking dish or individual plates if you prefer. Line up all your ingredients so easy folding.
place a tortilla down on a flat surface. Add your desired amount of beef, onion and cheese. Roll the tortilla with the seam side down and place in the baking dish or in a plate. Continue until all the tortillas have been used. You want to kind of eye the filling to make sue you have enough to the last tortilla or that you have used all of it by the last tortilla.
Ladle some of the sauce over the enchiladas, insuring the ends have sauce and the entire enchilada is covered in a little sauce. Add cheese down the middle of your enchiladas. You can cover if you really like them cheesy, but remember ou have cheese in the filling.
Place the enchiladas in the hot oven and cook just until your cheese has melted.
I serve these with Mexican rice and pinto beans! Yum! Delicious!