1sheet frozen butter puff pastry, defrosted90 gmunsalted butter, softened165 gm (¾ cup)white sugar4Granny Smith apples, trimmed, cut widthways into ½cm-thick rounds1½ tspground cinnamon1 tbspfresh lavender flowers (optional), to serveLavender honey ice-cream225 mlmilk150 mlheavy cream (45% milk fat)½ tspeach of vanilla and lavender essence (see note)6egg yolks180 gm (½ cup)lavender honey
For lavender honey ice-cream, combine milk, cream and essences in a heavy-based saucepan, bring to a gentle simmer and remove from heat. Whisk egg yolks and honey until thick and creamy. Gradually pour in milk mixture, whisking continuously. Return mixture to saucepan and cook over a low heat, stirring constantly, until mixture coats the back of a wooden spoon thickly (8-10 minutes). Remove from heat and strain through a fine sieve, then cool completely. Chill in refrigerator, then freeze in an ice-cream machine according to manufacturer’s instructions.
Roll pastry out on a lightly floured surface until 3mm-thick. Cut out a 26cm-diameter round from pastry using a plate turned upside down as a guide. Prick pastry with a fork, then transfer to a baking paper-lined oven tray and refrigerate until required.
Preheat oven to 250C. Spread butter thickly over base and sides of a 24cm-diameter frying pan. Scatter with sugar, then place over low heat and rotate to evenly melt sugar and coat pan. Cook until sugar is golden and caramelised (5-10 minutes). Remove from heat.
Arrange apple slices in pan in concentric circles, scatter with cinnamon and cook over low heat, without stirring, until apples soften (10-12 minutes). Cover with pastry and bake until pastry is crisp and golden (15-20 minutes). Transfer pan to a wire rack to cool for 10 minutes. To serve, place a plate over the mould and carefully invert. Serve with lavender honey ice-cream scattered with lavender flowers if desired.