Lay out frozen pastry on a flat surface, separating each sheet with a sharp knife. Leave to defrost while preparing the filling. Preheat oven to 160deg fan-forced.

in the bowl of a food processor, process the spinach and the shallots,

Add the eggs and the cheeses and process further.

Add the flour to create a slightly thickened paste.

Cut each square of pastry into 4 smaller squares.

Place a dollop of filling into each pastry square and fold the corners in to create a smaller square and pinch the corners.

Brush with beaten egg and sprinkle with sesame seeds.

Bake in a preheated oven for about 30-40 minutes till golden brown.

Cool on a wire rake to prevent them going soggy.