Chicken in a Pot with Dumplings

Name: Chicken in a Pot with Dumplings
Ingredients: 1 (4 pound) whole chicken; 2 carrots, scrubbed and halved; 1 onion, peeled and halved; 1 celery rib, cut in thirds; 5 peppercorns; 1 bay leaf; Water; 3 tablespoons of vegetable oil; 1 onion, chopped; 2 carrots, peeled and sliced; 1 celery rib, sliced; 2 potatoes, peeled and chopped; 4 tablespoons flour; 1/4 cup parsley, chopped; Salt and pepper; 1 1/4 cups flour; 1 1/2 teaspoons baking powder; 1/2 teaspoon salt; 2 tablespoons butter, chilled and cut into small bits; 1/2 cup milk; 2 tablespoons chopped parsley