Overnite Casserole - cooking recipe

Ingredients

1 (10 3/4 oz.) can cream of celery soup
1 c. milk
1 (6 1/2 oz.) can water-pack tuna, drained and flaked
1 c. uncooked elbow macaroni
1 c. frozen green peas
1 c. shredded Cheddar cheese (reserve 1/4 c. cheese)
1/2 c. chopped onion

Preparation

Mix milk and soup until blended in a 2-quart microwave bowl. Add all ingredients, cover and refrigerate overnight or at least 12 hours.
Cover with vented plastic wrap.
Microwave on High 15 to 17 minutes.
Sprinkle with reserved cheese.
Let stand, uncovered, until cheese melts.