Cheese, Onion and Potato Pies | Nigella's Recipes | Nigella Lawson

Ingredients

• 2 large egg yolks
• 1 teaspoon salt
• 2 x 15ml tablespoons cold water
• 250 grams plain flour
• 35 grams vegetable shortening (such as Trex) (teaspooned out)
• 90 grams cold unsalted butter (diced)
• 500 grams potatoes (waxy not floury)
• 100 grams spring onions - about 6 (chopped finely)
• 125 grams mature cheddar (75g/3oz grated, 50g/2oz diced)
• 2 x 15ml tablespoons grated Parmesan
• 50 grams Red Leicester cheese (grated)
• 2 x 15ml tablespoons chopped fresh parsley
• 4 x 15ml tablespoons creme fraiche to bind