Warm Winter Tart with Spiced Apple and a Calvados Sabayon

• 4 dessert apples, peeled, cored and diced

To make the pastry, place the flour, ground almonds and butter in a bowl. Work these ingredients in as for shortcrust pastry. Beat the egg, sugar and vanilla essence in another bowl until the mixture is very pale. Add the egg mixture to the flour mixture and rapidly combine. Finish on the table by kneading gently until the pastry is evenly combined. Wrap in cling film and rest in the refrigerat