1. Heat a large skillet over medium-high heat and add 1 pound of ground beef.
2. Break up the beef with a wooden spoon as it cooks.
3. Cook the beef for 5-7 minutes, or until it’s browned and no longer pink.
4. Add 1/2 cup of finely chopped onions to the skillet.
5. Continue cooking for an additional 2-3 minutes, until the onions are softened.
6. Stir in 1/4 cup of finely chopped dill pickles.
7. Add 2 tablespoons of Worcestershire sauce to the skillet and mix well.
8. Season the mixture with salt and pepper to taste.
9. Reduce the heat to low and let the beef mixture simmer for about 5 minutes to meld the flavors.
10. Drain any excess fat from the skillet to avoid greasy sloppy joes.
11. In a medium-sized bowl, combine 1/2 cup of mayonnaise with 2 tablespoons of French dressing.
12. Add 1 tablespoon of sweet pickle relish to the bowl.
13. Stir in 1 teaspoon of white vinegar, 1 teaspoon of sugar, and 1/8 teaspoon of salt.
14. Mix the ingredients well until the secret sauce is smooth and fully combined.
15. Taste the sauce and adjust seasoning if needed, adding more vinegar or sugar as preferred.
16. Cover the bowl with plastic wrap and refrigerate the sauce for at least 30 minutes for flavors to develop.
17. If desired, lightly toast 6-8 sesame seed buns under the broiler for 1-2 minutes to add crunch.
18. Spread a generous amount of the secret sauce on both the top and bottom halves of each bun.
19. Place a slice of American cheese on the bottom half of each bun.
20. Spoon the warm beef mixture over the cheese, dividing it evenly among the buns.
21. Top the beef with shredded iceberg lettuce for added crunch and freshness.
22. Add extra pickle chips on top of the lettuce for garnish, if desired.
23. Place the top bun on the sandwich and press gently to secure the ingredients.
24. Serve the Big Mac Sloppy Joes immediately while hot and enjoy!