Unbelievably easy mince pies | Rub 225g cold diced butter into 350g plain lour, then mix in 100g golden caster sugar and pinch of salt. Combine into ball and knead briefly. Chill or immediately press walnut-size balls into muffin tin. Add filling and cover with another round of pastry. Brush egg on tops. Bake in 200C for 15 mins.