**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
– 2 tablespoons ketchup
– 1 tablespoon Dijon mustard
– 1 tablespoon pickle relish
– 1/2 teaspoon garlic powder
– 1/2 teaspoon onion powder
– Salt and pepper to taste

**Instructions:**