Hearty Spinach Pie with Gouda

Finely grate the Gouda. Peel and finely dice the onion. Squeeze the thawed spinach well to remove excess liquid.

Preheat the oven to 170 °C top/bottom heat. Line a cake tin (approx. 25 cm diameter) with baking paper.

Lightly flour the work surface. Roll out the puff pastry to a square about 2–3 mm thick. Line the tin with the dough so that the edge is at least 2 cm high and the corners of the square extend beyond the tin.