Divide the ground beef into 12-13 pieces approximately 1/4 cup or 2 1/2 oz.
Roll each piece into a ball and place onto a tray. Refrigerate while you prep the other ingredients.
In a large dry skillet toast the burger buns then set them aside.
In the same skillet warm the butter or olive oil and then add the sliced onions. Stir in 1/4 tsp of the burger seasoning. Sauté until the onions are soft, tender, and slightly charred then remove them to a serving bowl.
Add olive oil or butter to lightly coat the bottom of the skillet.
Place 2 burger balls onto the skillet and let it fry for 30 seconds, then place a small piece of parchment paper over one of the burger balls and smash with a spatula until it's nice and flat (You may need to move your spatula around) . Repeat the process with the other burger.
Sprinkle 1/8 tsp of the burger seasoning on the the one side of the burger. Once it's browned and slightly crispy flip the burger and add another 1/8 tsp of the burger seasoning and 1/4 tsp of the Worcestershire sauce.
Once the burgers are cooked to your liking add 1 slice of provolone cheese to the top of each burger. Cover the skillet and let the cheese melt.
Layer the 2 burgers on top of each other then onto the burger bun.
Top the bun with the fried onions, garlic aioli, and pickles.