Caramelize 1 onion, sliced in a pan, then remove from the pan and set aside.
Add 1 pound ground beef to the same pan and cook until browned through.
Season with 1 tablespoon Montreal steak seasoning and 1 teaspoon garlic salt. Remove from heat.
Combine the beef with onions and cheese, stirring until melted together. If the cheese needs more heat to melt, return mixture to the pan to low heat briefly.
Mix mayo, mustard, ketchup, relish, and Worcestershire sauce together in a small bowl.
Wrap the wontons: Spoon the filling into 1 pack of wonton wrappers and seal the edges with water.
Pan fry in your choice of frying oil, 1-2 minutes per side or until golden brown.
Serve with the burger sauce for dipping.
