Brown ground beef in 10-inch nonstick skillet over medium-high heat, stirring occasionally and breaking into small pieces, about 4 minutes; drain. Season, if desired, with salt and pepper.
Reduce heat to medium-low, then stir in cheese, Hellmann's® or Best Foods® Real Mayonnaise and sour cream. Cook, stirring frequently, 6 minutes or until cheese is melted. Turn into shallow 2-quart dish. Top with tomato, onion, bacon and, if desired, pickle chips. Serve, if desired, with sesame bread sticks, crackers or your favorite dippers.