In a large skillet, heat olive oil over medium heat.
When hot, add the lean ground beef, salt, pepper and garlic powder to the pan. Cook until the beef is browned, then adjust with salt and pepper to taste if needed. Set aside and let cool while assembling the salad.
In a large mixing bowl, combine chopped salad with diced tomatoes, diced onions, sliced pickles, shredded cheddar and cooked beef.
Drizzle homemade Big Mac Sauce over the salad and toss very well.
Portion cheeseburger salad into bowls. Serve drizzled with more Big Mac Sauce and a sprinkle of sesame seeds.