½ quantityrough puff pastry30 gmbutter, coarsely chopped2golden shallots, finely chopped1garlic clove, finely chopped230 gmricotta50 gmGruyère, coarsely grated2 tbsp eachfinely chopped thyme, oregano and flat-leaf parsleyFinelygrated rind of 1 lemon, juice of ½1egg, lightly beaten180 gmmixed mushrooms, thickly sliced
Preheat oven to 200C. Roll out pastry on a lightly floured surface to 3mm thick, cut out a rough 30cm-diameter round, place on an oven tray lined with baking paper and refrigerate to rest (15 minutes).
Meanwhile, melt 20gm butter in a small saucepan, add shallot and garlic, sauté until tender (2-3 minutes), transfer to a bowl and combine with cheeses, herbs, rind and half the egg. Season to taste then spread in an even layer over pastry, leaving a 3cm border.
Melt remaining butter in a small saucepan, remove from heat, add lemon juice, season to taste. Scatter mushrooms over ricotta mixture, drizzle with butter mixture, then fold in pastry edges, pleating as you go. Brush edges with remaining egg and bake until crisp and golden (20-25 minutes). Serve hot.