150 gm(1 cup) plain flour1lemon, finely grated rind only2 tspground cinnamon1egg200 mlsweet sparkling wine, such as Prosecco or Moscato d’Asti2eggwhites2granny smith apples, cored and thickly sliced widthways100 mlrum or CalvadosFor deep-frying:vegetable oilTo serve:pure icing sugarCinnamon caramel190 gmcaster sugar2cinnamon quills150 mlsweet sparkling wine1 tbsppouring cream
Sift flour into a large bowl, make a well in the centre, add lemon rind, ground cinnamon, egg and half the sparkling wine, then whisk until smooth. Whisk in the remaining wine, cover with plastic wrap and rest at room temperature for 1 hour. Whisk the eggwhites until firm peaks form and fold through batter.
Meanwhile, for cinnamon caramel combine sugar, cinnamon and 150ml water in a small saucepan and stir over medium-high heat until sugar dissolves. Cook until dark caramel in colour (8-10 minutes), remove from heat and carefully add wine and cream, stirring to combine. Remove cinnamon and set aside.
Combine apple slices and rum in a bowl and stand for 15 minutes. Meanwhile heat oil in a deep-fryer or deep-sided saucepan to 180C. Drain apple, then dip slices in batter, shaking to remove excess and cook in batches, turning occasionally, until golden and apple is tender (5-7 minutes). Drain on absorbent paper, dust heavily with icing sugar and serve immediately with cinnamon caramel.