Mix onion soup mix, ground beef and egg together. Press into a cookie sheet all the way to the edges (will shrink up a lot). Polk holes in the meat with a fork and press diced onion into the meat. Bake for 10-15 minutes at 400.
Cut into 24 squares. Serve on dinner rolls or we really like them on Kings Hawaiian rolls. Top with 1/4 of a piece of plastic (processed American slices) cheese, pickle slice and a little ketchup.