macaroni shell salad recipe

8oz small shell macaroni
1/2 cup mayonnaise
1/2 cup sour cream
1/4 cup half-and-half
1/2 tsp salt
1/4 tsp pepper
1/4 tsp oregano
1 cup chopped celery
1/4 cup shredded carrots
1/4 cup chopped green pepper
1/4 cup chopped red pepper
1/4 cup chopped red onion

Cook macaroni according to pkg directions; drain. Rinse with cold water; drain again. Combine mayo, sour cream, half-and-half, salt, pepper, and oregano in a large bowl; stir until smooth. Add macaroni and remaining ingredients; toss lightly until well coated. Chill 2 hours. If desired add 1/4 cup green olives and/or garbanzo beans. I like to add 1 tbs honey mustard.