Preheat oven to 350 degrees.

In a bowl, whisk egg and milk together until blended. Then mix in the bread crumbs, onion, salt, and cheese.

Add the beef and mix until combined. Don't overwork the mixture.

Shape into 8 mini loaves and place in a 9 x 13 inch baking dish.

In a bowl, combine the ketchup, brown sugar and mustard. Place some of the mixture on each meatloaf and spread over the top.

Bake at 350 degrees for 45 minutes of until internal temperature is 160 degrees. Serves 8.