1 pound skinless, boneless chicken
breast halves - cubed
1 cup sliced carrots
1 cup frozen green peas
1/2 cup sliced celery
1/3 cup butter
1/3 cup chopped onion
1/3 cup all-purpose flour
1/2 teaspoon salt
1/4 teaspoon black pepper
1/4 teaspoon celery seed
1 3/4 cups chicken broth
2/3 cup milk
2 (9 inch) unbaked pie crusts