Cook the ground beef in a skillet over medium heat until browned, about 5-7 minutes.
Drain excess fat and season the beef with salt and pepper.
Chop the romaine lettuce and place it in a large serving bowl.
Add cherry tomatoes and diced pickles to the bowl with lettuce.
Let the cooked beef cool slightly before adding it to the salad.
Sprinkle shredded cheese over the top of the salad.
Drizzle with Thousand Island dressing and adjust to taste.
Toss the salad gently to combine all ingredients.
Garnish with sesame seeds if desired.
Serve immediately and enjoy your Big Mac salad!