Heat skillet over medium-high.
Add ground beef and seasonings.
Cook 6–8 minutes, breaking into crumbles, until browned.
Drain excess grease if needed.
Whisk together Greek yogurt, mayo, ketchup, mustard, pickles, and spices.
Adjust salt and sweetness to taste.
Start with lettuce base.
Add warm beef on top.
Sprinkle cheese so it slightly melts.
Add onions, pickles, and tomatoes.
Drizzle generously with special sauce.
Serve immediately and enjoy!