Chicken and Dumpling Casserole

INGREDIENTS:
3 Tablespoons olive oil
¾ cup chopped onion
1¼ cup chopped carrots
¾ chopped celery
3 cups chicken broth
3 Tablespoons flour
2½ cups chopped rotisserie chicken
1¼ cup frozen peas
½ teaspoon salt
½ teaspoon pepper
Dumplings
1 cup flour
2 teaspoons baking powder
¼ teaspoons salt
1 egg
⅓ cup milk
DIRECTIONS:
In a large skillet heat oil and add onion, carrots, and celery. Cook until tender. Add flour and ¼ cup broth. Stir until thickens and then slowly add the rest. Cook over medium heat until it thickens, about 3 minutes. Add chicken, peas, salt and pepper. Pour into baking dish.
Preheat oven to 400.
To make dumplings: In a medium mixing bowl add flour, baking powder, and salt. Wisk together. Add egg and milk and mix with a wooden spoon until just combined. Drop dough over chicken mixture with a spoon. (Makes about 8 dumplings) Bake for 15 minutes or until the dumplings are golden brown.