Spelt Ham and Leek Pie

Ingredients

• 250 g, Wholegrain Spelt Flour
• 125 g, Cold Unsalted Butter
• 1 Medium , Egg
• 2 tbsp, 2–3 Cold Water
• ½ tsp, Fine Sea Salt
• 1 tbsp, Olive Oil
• 1 tbsp, Butter
• 2 Medium , Leeks
• 200 g, Cooked Ham
• 1 tbsp, Plain Flour
• 150 ml, Whole Milk
• 100 ml, Double Cream
• 1 tsp, Dijon Mustard
• Salt and Black Pepper
• 1 Egg, , beaten