INGREDIENTS
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 3/4 onion, finely choppedâ¨
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1 stalk celery, dicedâ¨
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6 tbsp butter
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salt & pepperâ¨
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6 tbsp flour
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3 cups chicken stockâ¨
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1 cup milkâ¨
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1 large potato, diced and blanchedâ¨
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1 large carrot, diced and blanchedâ¨
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1 cup frozen peas, defrostedâ¨
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1 cup frozen corn, defrostedâ¨
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5 button mushrooms, halved and slicedâ¨
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2 chicken breasts, cooked and roughly chopped
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basic pie crust, rolled to 1/8-inch thick
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1 beaten egg