Chicken Stew over Biscuits

3 whole chicken breasts , bone in skin on or 6 chicken breast halves 3 tablespoons olive oil kosher salt fresh ground black pepper , to taste 5 cups chicken[...]

2 tablespoons olive oil 2 carrots , diced 2 celery ribs , diced 1 onion , diced 1/2 cup flour 2 (14 ounce) cans chicken broth 3 cups cooked chicken, diced 1[...]