Slow Cooker Chicken and Dumplings

Name: Slow Cooker Chicken and Dumplings
Prep time: 15 min
Cook time: 7 h
Total time: 7 h
Yield: 6
Ingredients: Ingredients; 2 lbs boneless, skinless chicken thighs; 1 large onion, diced; 3 carrots, sliced into rounds; 3 celery stalks, chopped; 3 cloves garlic, minced; 6 cups low-sodium chicken broth; 1 teaspoon dried thyme; 1 teaspoon dried sage; 1 bay leaf; 1 teaspoon salt; 1/2 teaspoon black pepper; 1/4 cup cornstarch; 1/4 cup cold water; 1 cup frozen peas; 2 tablespoons fresh parsley, chopped; Dumplings; 2 cups all-purpose flour; 1 tablespoon baking powder; 1 teaspoon salt; 1/4 cup cold butter, cubed; 3/4 cup whole milk; 2 tablespoons fresh chives, chopped (optional)