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Golden Onion & Swiss Burgers

Source of Recipe


LHJ, Recipes 2000






List of Ingredients



• 2 Tbsp butter, divided
  
• 1 large sweet onion, such as Spanish or Vidalia, very thinly sliced
  
• Salt
  
• 1 lb. lean ground beef
  
• 1 cup shredded Swiss cheese
  
• 1 Tbsp Dijon mustard
  
• 1 tsp salt
  
• 1/2 tsp freshly ground pepper
  
• 1/2 tsp chopped fresh thyme
  
• 8 slices rye bread
  
• 1 large beefsteak tomato, sliced
  






Instructions



1. Heat 1 tablespoon of the butter in a 12-inch nonstick pan over medium heat. Add onion and cook 18 to 20 minutes, until browned and very tender, stirring occasionally. Add a pinch of salt.
   
   
2. Toss beef with cheese, mustard, salt, pepper, and thyme; shape into four 1/2-inch-thick patties.
   
   
3. Heat a grill pan or cast-iron skillet. Grill patties 5 to 6 minutes per side, until done (160 degrees F on an instant-read thermometer inserted into side of burger).
   
   
4. Heat a large nonstick skillet over medium heat. Spread the remaining 1 tablespoon butter evenly over 1 side of bread slices. Place 2 slices, buttered side down, in skillet and cook about 1 minute, until toasted. Spread onion topping on untoasted side of bread; add tomato and burger. Top each with another bread slice, buttered side out. Turn and toast other side. Repeat with remaining bread slices, onion, tomato, and burgers.
   
   Makes 4 servings.