Prepare the crockpot by lightly greasing the interior with cooking spray or a small amount of oil.
Place the chicken breasts in the crockpot, and pour the chicken broth and cream of chicken soup over the top.
Add the diced onion, sliced carrots, diced celery, garlic powder, Italian seasoning, salt, and pepper. Stir gently to combine.
Cover the crockpot and cook on low for 6 hours or on high for 3 hours until the chicken is cooked through and tender.
After cooking, remove the chicken and shred it with two forks. Return the shredded chicken to the crockpot.
Stir in the frozen peas, and then spoon the biscuit dough on top of the mixture in the crockpot.
Cover and cook on high for an additional 30 minutes or until the dumplings are cooked through and fluffy.
Serve hot, garnished with freshly chopped parsley.