Bobby Flay'S Hamburger With Double Cheddar Cheese

• 2 lbs freshly ground chuck
• salt & freshly ground black pepper
• 8 slices white cheddar cheese, sliced 1/4-inch thick
• 8 slices yellow cheddar cheese, sliced 1/4-inch thick
• 8 perfect hamburger buns
• 8 leaves romaine lettuce
• dill pickle, sliced
• ketchup
• HORESERADISH MUSTARD
• 1/2 cup Dijon mustard
• 2 tablespoons prepared horseradish, drained
• GRILLED VIDALIA ONIONS
• 2 vidalia onions, sliced crosswise, 1/4-inch thick slices
• 2 tablespoons olive oil
• salt & freshly ground black pepper

1. Preheat grill or a cast iron skillet to high.
2. Divide the sirloin into 8(4-ounce) burgers.
3. Season on both sides with salt and pepper, to taste.
4. Grill or cook in the skillet for 3 to 4 minutes on each side for medium-rare doneness.
5. During last minutes of cooking add 2 slices of cheese to each burger, cover grill and let melt, approximately 1 minute.
6. Place burger on bun and top with Horseradish Mustard, lettuce, Grilled Vidalia Onions, pickles and ketchup.
7. HORESERADISH MUSTARD: Whisk mustard and horseradish together in a small bowl.
8. GRILLED VIDALIA ONIONS: Brush olive oil on both sides of the onions and season with salt and pepper. Grill the onion slices for 3 to 4 minutes on each side until golden brown.

ground chuck, salt, cheddar cheese, cheddar cheese, buns, romaine lettuce, dill pickle, ketchup, dijon mustard, horseradish, vidalia onions, vidalia onions, olive oil, salt

Taken from www.food.com/recipe/bobby-flays-hamburger-with-double-cheddar-cheese-239249 (may not work)