Tuna Seaside Salad

Ingredients
1 pkg (7-1/4 oz.) KRAFT Macaroni & Cheese Dinner
10 oz pkg. frozen peas, thawed, drained
1 can 6-1/8 oz.) tuna, drained, flaked
1 cup chopped celery
1 /2 cup MIRACLE WHIP Salad Dressing
1/4 cup sweet pickle relish, drained
2 Tbs finely chopped onion
2 Tbs chopped pimiento, drained

Directions
Prepare Dinner as directed on package.
Add remaining ingredients; mix well. Refrigerate. Add additional salad dressing before serving, if desired.