In a large non-stick pan over medium/high heat, brown the Ground Beef (2 pound), Onion Flakes (2 tablespoon), Worcestershire Sauce (1 tablespoon), Salt and Pepper (to taste). Drain excess grease and transfer to a large casserole dish.
For the Big Mac sauce, combined Mayonnaise (1 cup), Natural Ketchup (1/2 cup), Yellow Mustard (2 tablespoon), Fresh Chives (1 tablespoon), Salt and Pepper (to taste) and mix well, divide 2/3 cup and set aside and use the rest for dressing later
Preheat oven to 350 degrees F (180 degrees C).
To the ground beef, add Shredded Sharp Cheddar Cheese (1 cup) and 2/3 cup Big Mac sauce. Mix until all ingredients are well combined.
Flatten beef down into a nice and even, compact layer. Top with Dill Pickle Coins (1 cup). Sprinkle the remaining Shredded Sharp Cheddar Cheese (1 cup) the top. Sprinkle the Sesame Seeds (2 tablespoon) on top of the cheese. Bake for 20 minutes.
Turn the oven grill or broiler to high and bake for another 5 minutes or until the top is slightly brown.
Plate each serving on top of a bed of Lettuce (1 head) and top with remaining Big Mac sauce.