2 pounds small red potatoes, quartered
5 hard-cooked eggs
3/4 cup fat-free mayonnaise
2 teaspoons cider vinegar
1 teaspoon sugar
1 teaspoon ground mustard
1/2 teaspoon salt
1/4 teaspoon pepper
1 large sweet onion, chopped
2 celery ribs, chopped
1/2 cup chopped green onions
1/2 cup julienned sweet red pepper
1/4 cup minced fresh parsley