Preheat the oven to 180 oC
Unroll the pastry sheet onto a piece of parchment paper on a baking sheet
Use a saucer to cut out four circles of pastry

Sprinkle half caster sugar over the pastry circles
Pile the strawberries into the centre of each circle leaving a 1” border of pastry on the outside
Brush the beaten egg around the border of the pastry circles

Fold in the edges of the pastry overlapping the folds as necessary
Brush the border with the beaten egg and sprinkle with the remaining caster sugar
Bake for 20 minutes