1 can cream of celery soup
1 cup milk
1 can Tuna, drained
1 cup uncooked elbow macaroni
1 cup frozen green peas
1/2 cup onion
1 cup Cheddar cheese, reserve 1/4 cup
Whisk soup and milk in 2 quart bowl. Stir in remaining ingredients. Cover and refrigerate 12 hours or overnight.
Cover with vented plastic. Microwave 15 to 17 minutes until bubbly. Sprinkle with cheese. Let stand uncovered 5 to 7 minutes.