1 lb. macaroni pasta
4 hard-cooked eggs, chopped
1 c. chopped celery
1/2 finely chopped red bell pepper
1/3 c. chopped red onion
1/2 c. buttermilk
1/2 c. mayonnaise
2-1/2 tbsp. cider vinegar
1-1/4 tsp. salt
1/4 tsp. ground red pepper
1/4 tsp. freshly ground pepper

Cook pasta according to pkg. directions. Transfer to colander and rinse under cold water; drain. Meanwhile, combine remaining ingredients in a large bowl until well blended. Add cooled pasta and toss to coat.