1 Egg yolk — beaten
1/2 pound Lean ground beef
2 tb Grated onions
1/2 t Salt
1 dash pepper
6 slices Bread
2 cups Cheddar cheese, cut into cubes
In a bowl, combine egg yolk, ground beef, onion, salt and pepper. Shape mixture by teaspoonfuls into 24 balls.
Remove crusts from bread; roll flat and cut into 1 – 1/2 inch rounds.
Place meatballs on bread rounds; make a depression in each ball and fill with a cube of cheese, making sure bread is covered with meat mixture. Place on baking sheet.
Broil in preheated oven about 5 inches from heat 3 – 5 minutes or until no pink remains. Garnish with ketchup, mustard, sliced green onions or sliced dill pickles if desired.