Cheesy Chicken-Corn Chowder

1 whole small chicken breast
1/4 cup chopped onion
1/4 cup chopped celery
1 10 3/4-ounce can condensed cream of chicken soup
1 8 3/4-ounce can whole kernel corn
1/2 cup milk
1/2 cup shredded American cheese
2 tablespoons chopped pimiento

In a saucepan combine chicken, onion, celery, and 1/4 cup water.
Bring to a boil, reduce heat.
Cover and simmer 15 to 20 minutes.
Remove chicken; when cool, cut off meat and chop.
Return meat to broth; stir in remaining ingredients.
Cook, uncovered, for 10 minutes.