In a large skillet over medium heat, add the ground beef. Season with sea salt, garlic powder, and black pepper to taste. Cook until the beef is browned and fully cooked, about 8-10 minutes. Drain any excess fat if necessary.
In a bowl, combine mayo, ketchup, dill relish, and Dijon mustard. Whisk until smooth and well blended. Adjust the seasoning to your taste if needed.
While the beef is cooking, wash and chop the Romaine lettuce, chop the tomatoes, slice the pickles, and thinly slice the red onion. Set aside.
In a large serving bowl, add the chopped Romaine lettuce as your base. Layer on the cooked ground beef, chopped tomatoes, sliced pickles, shredded cheese, and red onion.
Pour the prepared dressing over the salad. Toss gently to combine all the ingredients and evenly coat them with the dressing.
Serve your Big Mac Salad immediately in individual bowls or on plates. Enjoy the flavors of a Big Mac in a fresh and healthier way!