Fiesta Pasta Salad

here is the pasta salad recipe from the BBQ last night.

12 oz. twisted pasta cooked and drained
1 can olives drained and chopped
1 can garbanzo beans drained
1 can corn drained
1 can black beans drained
1 red onion diced
red or green pepper chopped
1 package fiesta ranch dip
2 cups mayonnaise
2 cups buttermilk

Mix the mayonnaise, buttermilk and fiesta ranch dip. All all the ingredients into a bowl and mix together. Add cheese, tomatoes or avocado.