Prepare the refried beans from the shortcut below, I don't know how many cups or cans this makes, I make mine in batches of 500 grams (1 lb) dry beans. These take 8 hours, so you can either start the beans really early or make the casserole the next day, which is what I did.
Preheat your oven to 180 C (350 F). Prepare the enchilada sauce according to the package or shortcut instructions.
Lay a tortilla on your work surface, spread some refried beans in the middle, top with some shredded cheese.
Fold or roll up the tortilla and place seam side down in a 7x11 baking dish. Repeat with the remaining 3 tortillas.
Spoon some beans into each end of the dish.
Spoon the rest of the beans over the top of the enchiladas and spread out evenly. Pour on the enchilada sauce, then top with the remaining cheese.
Bake for 20-30 minutes to warm through and brown the cheese.
Let casserole rest for a few minutes, then dig in and enjoy (see, I said it was nothing special to look at).