Steps
1. Preheat a skillet or grill over medium heat.
2. Cook the beef patties for about 3-4 minutes on each side, seasoning with salt and pepper.
3. While the patties cook, mix the mayonnaise, ketchup, and mustard in a small bowl to make the special sauce.
4. Toast the sesame seed bun and plain bottom bun lightly on the skillet.
5. Assemble the burger: spread a layer of special sauce on the bottom bun, add shredded lettuce, a beef patty, a slice of cheese, some chopped onions, and two pickle slices.
6. Add the plain bottom bun on top of the first layer, then repeat with more sauce, lettuce, the second beef patty, and the top sesame seed bun.
7. Serve immediately and enjoy your homemade Big Mac-inspired burger!