Heat a large skillet over medium-high heat

Add ground beef and press it down firmly to create a smashed layer

Season evenly with salt, pepper, garlic powder, onion powder, and smoked paprika

Let the beef cook undisturbed until a browned crust forms

Break apart the beef and continue cooking until fully browned

Stir in diced onions and cook until softened

In a separate bowl, mix mayonnaise, sugar-free ketchup, mustard, and optional pickle juice

Lower heat and stir half of the sauce into the beef mixture

Sprinkle shredded cheddar cheese evenly over the top

Cover briefly and allow cheese to melt completely

Remove from heat and top with chopped dill pickles and shredded lettuce

Drizzle remaining sauce over the skillet before serving