Creamy Chicken and Leek Pie

Ingredients

• For the dough:
• 2 cups of flour
• 6 ounces of butter
• 1 egg
• ¼ cup sour cream
• 1 tablespoon milk
• salt
• For the pie filling:
• 1 tablespoon butter
• 12 ounces of leek green and white parts, thinly sliced
• 2 tablespoons of flour
• 1 ½ cups of chicken stock
• 14 ounces of cooked chicken, shredded
• 2 tablespoons of sour cream
• 2 fresh rosemary
• egg wash