Add the ground beef to a large skillet over medium-high heat. (You can add a little oil if needed.) Break apart with a spatula and season with salt and pepper. Cook for 8-10 minutes, stirring occasionally, until the beef is browned and moisture has evaporated.
Meanwhile, puree all the dressing ingredients in a blender. If dressing is thicker than you like, thin out with water or oil and puree again. Adjust sweetener to taste. Refrigerate until ready to serve.
In a large bowl, combine the lettuce, tomatoes, shredded cheese, and pickles.
Add the ground beef. Drizzle the dressing over the salad. Toss to coat.
Garnish with sesame seeds if desired.