Betty’s Flavorful Chicken and Dressing Casserole

Ingredients:

4 uncooked chicken breasts
1 tablespoon butter
1 tablespoon extra virgin olive oil
1 can cream of celery soup
1 can cream of chicken soup
½ cup chicken broth
½ package dry onion soup mix
½ of a 14-oz.
2 cups chicken broth
1 cooking oil spray