1 c. diced celery
1 onion, diced
4 c. cut up cooked chicken
1 (4 oz.) can mushrooms, stems and pieces
1 c. sour cream
1 can cream of mushroom soup
1 (2 oz.) jar diced pimento
1 (6 1/4 oz.) pkg. Uncle Bens Long Grain and Wild Rice (Original Fast Cooking Recipe), cooked according to package directions

Saute celery and onion in 1/4 cup butter. Combine all ingredients. Bake 1 hour at 350 degrees (first 1/2 hour covered, last 1/2 hour uncovered).