Cook the pasta in a large pot of boiling water until al dente. Drain and let it cool. Tip: Add 1 tbsp olive oil to the water to help prevent the pasta from sticking together.
Cook the ground beef in a large skillet over medium-high heat, breaking it apart as it cooks. Once browned, drain the excess grease and season with salt and pepper. Allow to cool.
In a large bowl, combine the cooled pasta, ground beef, shredded lettuce, cheddar cheese, diced onions, and pickles.
Add the Big Mac sauce and mix everything together until well coated.
Sprinkle the sesame seeds on top for that signature Big Mac flavor.
For best results, let the salad chill in the fridge for a couple of hours before serving.