Looking for easy Salisbury Steak/Hamburger Steak recipe?

Cook hamburgers on Monday and let the leftovers sit for days and days. Then take it out of the refrigerator on Saturday, pour some gravy on it and pop it in the microwave. That's how they make it at school cafeteria's. Not a big fan. Surprise her with a nice piece of salmon and veggies or something, anything but salisbury steak