In A Shallow 1-1/2-Qt. Microwave-Safe Dish, Combine The Sour Cream, Beans, Chilies And Dip Mix. Stir In 1 Cup Cheese. Cover And Microwave On High For 2 Minutes; Stir. Cover And Microwave 1-1/2 Minutes Longer Or Until Heated Through; Stir Until Blended. Sprinkle With Remaining Cheese. Top With The Olives, Tomatoes, Onions And Lettuce If Desired. Serve With Tortilla Chips.