I found this recipe several years ago. If you try it, you'll probably never make it any other way. My daughter uses this recipe too. I haven't found anyone who doesn't like these. I hope you enjoy them too! :)
In a bowl, beat egg, and milk together. Stir in cheese, oats, onion, and salt. Add beef and mix well. Shape into 8 loaves. Place in a 13inch by 9inch baking dish. Combine, Ketchup, brown sugar, and mustard. Spoon over loaves. Bake uncovered, at 350 for 45 minutes or until meat is no longer pink. Enjoy!