Tuna/Shell Macaroni Salad

3 cups (measure uncooked) shell macaroni, cooked and drained
1 (12 1/2 oz.) can albacore solid white tuna, drained
1/2 cup celery, chopped
4 hard-boiled eggs, chopped
finely chopped sweet onion to taste
1/4 cup sweet pickle relish
1 tablespoon prepared mustard
3/4 teaspoon salt (or to taste)
1 1/4 cups Kraft Miracle Whip Salad Dressing

Combine shells, tuna, eggs, celery and onion in a large bowl. Combine Miracle Whip, mustard, relish and salt together in a small bowl, mix thoroughly, and pour over macaroni/tuna mixture. Toss lightly. Chill at least 3 to 4 hours before serving. Garnish with wedges of additional hard-boiled eggs and tomato wedges. 8 servings.