2combine beaten egg, milk, uncooked oates, and salt in a large bowl. Add the ground beef or turkey, mixing well.
3divide mixture into 12 equal portions. Insert 1 cheese cube into the center of meat and roll in hands to form the meat into a ball around the cheese. Place into muffin tin and continue with remaining meat and cheese.
4combine the ketchup and brown sugar in a separate small bowl. stir thoroughly and spread over each mini meatloaf.
5Bake uncovered on center oven rack for 30 minutes.