Homemade Chicken Pot Pie - Where The Food Comes From

Ingredients

• 1½ cups flour, (plus more for flouring)
• dash of salt
• ¾ cup shortening,
• 5 tablespoons cold water
• 6 tablespoons unsalted butter
• 1 yellow onion, (finely chopped)
• 3 large celery stalks, (diced)
• 3 large carrots, (peeled and diced)
• 1 russet potato, (peeled and diced)
• 1 teaspoon kosher salt, (plus more for sprinkling)
• ½ teaspoon freshly ground black pepper
• 1 teaspoon chopped fresh thyme
• ¼ teaspoon celery seed
• 2 cups cooked, chopped chicken breasts
• 1 cup fresh or frozen peas
• ½ cup all-purpose flour
• 3 cups chicken stock
• ¼ cup milk
• 1 large egg