Burger Patty Melts & Special Sauce

Oh man, awesome. Definitely making again. Served this with my Cajun French Fries and some salad (would have been good with corn on the cob too). Burgers from here.  Sauce from here.

Burger Ingredients:

• 1 pound (~450 g) 85% lean ground beef
• 1 medium yellow onion grated
• 1 large egg, lightly beaten
• 1 teaspoon of kosher salt
• 1 teaspoon freshly ground black pepper
• ¼ teaspoon garlic powder
• butter
• wholemeal bread
• slices of cheese

 What you do:

1. In a medium bowl, combine the meat, grated onion, egg, salt, pepper, and garlic powder. Form into 6 thin patties.
2. Heat a bit of olive oil in a large, heavy-bottomed skillet over medium-high heat. Cook the patties for about 3 minutes per side, or until browned. Remove from the pan and place on paper towels to drain. Set aside. Drain the grease from the skillet.
3. Spread the butter on one side of each slice of bread. Place butter side down in the skillet. Top each with a slice of cheese and a burger patty. Top with the remaining cheese, if desired, and a final slice of bread, butter side up.
4. Cook for about 2 minutes per side, or until golden brown. Remove from the heat and serve with special sauce (recipe below).

Burger Sauce

• 2 tablespoons mayonnaise
• 1 tablespoon ketchup
• small squirt of mustard 
• 1/2 teaspoon sweet pickle relish
• 1/2 teaspoons sugar
• 1/2 teaspoon white vinegar
• 1/4 teaspoon ground black pepper

*Mix all sauce ingredients together. set aside.