Prep the base: Chop or shred the lettuce and add to 4 bowls.
Slice the avocados and set aside. Have tomatoes, onions, pickles, and cheese ready.
Mix the burger seasoning: In a small bowl, combine 1 tsp salt, 1/2 tsp black pepper, 1 tsp garlic powder, 1/2 tsp onion powder, and 1/2 tsp smoked paprika.
Cook the beef: Heat a large skillet over medium-high. Add oil, then crumble in the ground beef.
Sprinkle with the seasoning blend. Cook 5–7 minutes, stirring and breaking it up, until browned with crispy edges. Drain excess fat if needed, but leave a little for flavor.
Make the sauce: In a cup, whisk mayonnaise, sugar-free ketchup, mustard, and 1–2 tsp vinegar or pickle juice.
Adjust salt and pepper. For heat, stir in a pinch of cayenne or hot sauce.
Assemble the bowls: Top the lettuce with warm beef, then add avocado, tomatoes, onions, and pickles. Sprinkle cheese over the hot beef so it softens slightly.
Finish and serve: Drizzle the sauce over each bowl.
Add optional bacon, jalapeños, pork rinds, or sesame seeds. Serve right away while the beef is still warm.