**Patty Melts with Secret Sauce**
**Patty Melts with Secret Sauce** **Ingredients:** *For the Patty Melts:* – 1 lb ground beef (80/20) – 1 onion, thinly sliced – 4 slices Swiss or cheddar cheese – 8 slices rye or sourdough bread – 2 tablespoons butter, softened – Salt and pepper to taste *For the Secret Sauce:* – 1/4 cup mayonnaise – …