I found a special sauce to put on it, which sometimes I make, but sometimes I just love the flavor of the sandwich itself.
Special Sauce (recipe below)
1 Vadalia onion, sliced thin and caramelized (How to caramalize below)
1 lb. ground beef
1/2 tsp. garlic salt (opt.)
1 Tbsp. Worcestershire sauce
4 Tbsp. butter, softened
8 slices of rye, sour dough or swirl bread
8 slices Swiss Cheese
4 Tbsp. butter
Special Sauce: (make ahead)
1/8 cup Dijon mustard
1/8 cup mayonnaise
1/2 Tbsp. barbecue sauce
A couple drops of hot sauce (optional)
In a small bowl, stir together above ingredients until mixed. Store, covered, in refrigerator up to 3 days.
Caramelized Onions: (make before the burgers)
In a medium cast-iron skillet, melt butter over medium heat. Add onion. Cook, stirring occasionally, until onion is soft and golden brown. Keep warm.
In a large bowl, combine ground beef, Worcestershire, salt and pepper. Shape ground beef into 4 oval patties (to fit bread). Patties should be thin.
In a large skillet, cook patties over medium-high heat until browned and cooked through, approximately 2 minutes per side. Remove skillet from heat. Remove patties from skillet; wipe out skillet.
Layer 1 bread slice with 1 tablespoon Secret Sauce, 2 to 3 tablespoons caramelized onions, 1 slice cheese, 1 patty, and another tablespoon Secret Sauce. Top with another bread slice. Repeat with remaining bread, Secret Sauce, caramelized onions, cheese and patties.
Heat skillet over medium-high heat. Melt 2 tablespoons butter in skillet. Working in batches, cook sandwiches, flipping once, until golden brown and heated through, approximately 3 minutes per side. Add remaining butter to skillet as needed.
"My flesh and my heart may fail, but God is the strength of my heart and my portion forever." -Psalm 73:26