Slow-Cooked Chicken and Biscuits

chopped round red potato (2 medium)

coarsely chopped carrot (2 medium)

coarsely chopped onion (1 medium)

coarsely chopped celery (1 medium)

4 - ounce can (drained weight) sliced mushrooms, drained

garlic, minced

dried thyme, crushed

dried sage, crushed

salt

ground black pepper

quick-cooking tapioca, crushed

bone-in chicken thighs, skinned

chicken broth

frozen peas

3 - ounce package cream cheese, cut up

recipe Cheesy Biscuits (see recipe below)

packaged biscuit mix

shredded cheddar cheese (2 ounces)

milk