French Country Chicken

1 onion, chopped
6 carrots, peeled and sliced diagonally
6 stalks celery, sliced diagonally
18 boneless, skinless chicken tenders
1 teaspoon dried tarragon
1 teaspoon dried thyme
1/2 teaspoon white pepper
10-3/4 oz. can cream of chicken soup
1-1/2 oz. package onion soup mix
1/3 cup chicken broth
2 tablespoons cornstarch
cooked rice or mashed potatoes

Combine onion, carrots and celery in the bottom of a slow cooker. Arrange chicken on top; sprinkle with seasonings. Mix together chicken soup and onion soup mix; spoon over chicken. Cover and cook on high setting for 4 hours, stirring after one hour. At serving time, stir together broth and cornstarch; pour over chicken and mix well. Cook, uncovered, for an additional 10 minutes, until thickened. Stir again; serve over cooked rice or mashed potatoes. Makes 8 servings.