A salad unlike any other.
In a medium bowl, combine sour cream, mayonnaise, vinegar, ranch dressing mix, ground mustard, pepper and salt; mix well. Add carrots, onion, green pepper and olives. Slice cheese into thick strips, add to vegetable mixture; mix well (may be covered and refrigerated overnight, if desired). Just before serving, place popped popcorn in a large bowl, removing any unpopped kernels. Add sour cream and vegetable mixture, gently stir until well mixed. Serve immediately.