Preheat the barbecue for indirect cooking. While the barbecue is preheating start to prepare the berry tarts.
To make the tarts cut each sheet of puff pastry into four equal squares.
Place the puff pastry on to a baking tray lined with baking paper. Make sure a gap is left between each tart for even cooking.
Fold over the edges of each piece of pastry to make a one centimeter border.
In the centre of the pastry, place a heaped tablespoon worth of berries.
On top of the berries dot small amounts of butter and then sprinkle with the brown sugar, mixed spice and flaked almonds.
Once the barbecue is preheated turn the outside burners to medium and the centre burner off.
Place the baking tray in the centre of the barbecue and bake the tarts for 25-30 minutes or until the pastry is golden brown and the berries are bubbling.
Serve with ice cream.