Ingredients:

1 lb ground beef
8 slices of rye bread
8 slices of Swiss cheese
1 large onion, thinly sliced
4 tbsp butter, plus more for spreading
Salt and pepper to taste
For the Secret Sauce:
1/2 cup mayonnaise
2 tbsp ketchup
1 tbsp relish
1 tsp Worcestershire sauce

1/2 tsp garlic powder
1/2 tsp onion powder
Salt and pepper to taste

Directions: