In a bowl, beat the egg and milk. Stir in cheese, oats, onion and salt. Add beef and mix well.

Shape into eight loaves; place in a greased 13x9 inch baking dish.

Combine ketchup, brown sugar and mustard. With a teaspoon make a dip/groove in the top of each loaf. Spoon ketchup mixture over each one.

Bake, uncovered, at 350°F for 45 minutes or until the meat is no longer pink.