Cut the puff pastry using a pastry cutter.
Prick the middle and sprinkle with brown sugar, then bake at 180°C for approx. 15 minutes. Remove from the oven and leave to cool.
Slice the apples thinly, leaving the peel on, and put them in water and lemon, then cook them lightly in Fabbri Elderflower Syrup.
Spread custard over the puff pastry base, then arrange the apple slices neatly on top.
Sprinkle with brown sugar and run a blowtorch over the top (or place under the grill for 5 minutes).
Garnish with fresh mint.