Sizzling Gourmet Patty Melts with Secret Sauce Recipe to Savor - Dave's Grill

Ingredients

• 1 lb (450 g) ground beef
• 8 slices Swiss or cheddar cheese
• 8 slices rye or sourdough bread
• 2 medium onions, thinly sliced
• 4 tbsps (60 ml) unsalted butter
• 2 tbsps unsalted butter
• ¼ cup (60 ml) mayonnaise
• 1 tbsp ketchup
• 1 tbsp Dijon mustard
• 1 tsp Worcestershire sauce
• 1 tsp sugar (optional, for extra sweetness)
• 1 tsp pickle relish (sweet or dill)
• ½ tsp garlic powder
• ¼ tsp salt
• ¼ tsp smoked paprika
• Salt and pepper, to taste