Make Special Sauce: Combine ingredients in a small bowl; Stir to combine. Set aside until the remaining ingredients are ready. 

Caramelized Onions: Bring large cast iron skillet to medium-high heat. Add olive oil and move it around so that the entire pan is coated. Add onions and sprinkle with salt and pepper. Move onions around the pan and bring heat down to medium heat once onions start to cook down. Continue cooking onions for 15-30 minutes, turning heat down as necessary, until they start to turn golden brown. Set aside until the rest of the meal is ready.

Cook Beef: Bring large cast iron skillet to medium high heat. Add ground beef, kosher salt, ground black pepper, garlic powder, and onion powder. Stir to combine and continue cooking until meat is cooked through. Pour off any excess grease. Taste and adjust any seasonings, as desired. 

Build Bowls: Divide the lettuce, tomatoes, purple onion, bacon, pickles, and avocado between two bowls. Then divide the cooked hamburger and caramelized onions between the two bowls. 

Serve: Top with as much Special Sauce as you want and enjoy!