Sloppy Joe Grilled Cheese Sandwiches

Brown ground beef with onion in skillet until fully cooked. Drain off any grease.

Add mustard, ketchup and brown sugar and Worcestershire, simmer for 5 minutes.

Spread butter on one side of each slice of bread.

To assemble sandwiches, place one slice of bread, butter side down onto griddle or skillet. Sprinkle with cheddar cheese, a scoop of the beef mixture, and top with some more shredded cheese. Place a piece of bread on top, butter side up. Cook over medium heat until browned, carefully flip over and cook other side until browned.