Place the puff pastry slices next to each other and defrost. Then lay on top of each other and roll out to a rectangle (33 x 38 cm). Place the dough on a greased baking tray and pull the edges up a little. Clean the spring onions, leaving some of the greens. Cut the spring onions into slices.
Wash and halve the grapes. Whisk bresso and eggs. Season with salt and pepper. Spread the bresso mixture evenly on the dough. Cover with spring onions and grapes in a circle. Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for 40-45 minutes. In the meantime, clean and wash the leek and cut into fine rings. Heat the oil in a pan and steam the leek for 1-2 minutes. Season with salt.
Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for 40-45 minutes. In the meantime, clean and wash the leek and cut into fine rings. Heat the oil in a pan and steam the leek for 1-2 minutes. Season with salt. Take the cake out of the oven. Spread the leek rings irregularly on the cake