Animal-Style Burgers

COMMENTS:
I'm not sure why these burgers are called this, but that's what Food Network called them. They were absolutely wonderful! My husband questioned the step with the mustard but it did something magical to the burgers! Oh, and the extra time for the onions is so worth it!

INGREDIENTS:
2 Tablespoons oil
1 cup chopped onions
kosher salt
1/4 cup mayonnaise
2 Tablespoons ketchup
1 Tablespoon chopped pickle
1/2 teaspoon vinegar
2 pounds ground beef
1/4 cup yellow mustard
8 slices of cheese

DIRECTIONS:
Heat the vegetable oil in a large skillet. Add onions and salt. Cover and cook over medium-low heat for 30 minutes, stirring occasionally. Uncover and increase the heat to medium-high, stirring often, until caramelized (8-10 more minutes). Add 1/2 cup water to the skillet, scraping up any browned bits from the bottom of the pan. Simmer, stirring, until the water evaporates, about 2 more minutes. Transfer to a bowl and set aside.

Mix the mayonnaise, ketchup, chopped pickle, and vinegar in a bowl; set aside. Shape the beef into 8 patties, about 4 inches wide and 1/2 inch thick.

Season both sides of the patties with salt and pepper. Put the patties on the grill and cook 3 minutes. Spread about 1 1/2 teaspoons mustard on the uncooked side of each patty, then flip and top each with 1 slice cheese; continue cooking about 2 more minutes for medium doneness. 

Serve with mayonnaise mixture and grilled onions. (Toasted buns, lettuce, tomato slices, etc. would be amazing here too!)

SPECIAL NOTE:
If I have labeled a recipe as GlutenFree or Dairy Free but it appears to have those ingredients in it... that means the recipe is still delicious with substitutes/replacements. Ex: soy milk, lactose-free cheese, Bragg's liquid aminos (for soy sauce), all-purpose gluten free flour (Better Batter is my favorite), etc. Please check your individual ingredients to be sure they are GF or DF, if that is what you need.