Homemade Chicken Pot Pie--Make Ahead and Freezable!

INGREDIENTS

1 cup

chopped onion

1 cup

chopped celery

1 cup

chopped carrot

1/3 cup

butter or margarine

1/2 cup

all-purpose flour (sifted)

2 cups

chicken broth

1 cup

milk (I personally use skim or 1% milk and it's still good!)

2 cups

chicken (cooked, chopped)

1 cup

frozen peas (thawed)

1 tsp

salt

1/2 tsp

pepper

unbaked pie crusts (homemade or store-bought)