French Onion Patty Melt Recipe - Ultimate Comfort Food Sandwich

French Onion Patty Melt Recipe - Ultimate Comfort Food Sandwich

recipesbyclare.com

Massive patty melt with caramelized onions, Gruyere cheese, and garlic aioli. All the flavors of French onion soup in sandwich form!

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Ingredients

  • 3 tablespoons butter
  • 3 large yellow onions, thinly sliced
  • 2 pounds ground beef (80/20 blend)
  • 1 tablespoon ketchup
  • ½ teaspoon garlic powder
  • 1 teaspoon kosher salt
  • ½ teaspoon black pepper
  • 2 cups Gruyere cheese, freshly shredded
  • 12 slices thick Texas toast bread
  • 8 teaspoons mayonnaise (for grilling)
  • ⅓ cup mayonnaise
  • 1 tablespoon fresh lemon juice
  • 1 teaspoon black pepper
  • 1 tablespoon fresh garlic, minced (about 3 cloves)
  • 1 teaspoon fresh parsley, chopped

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