Cut the pumpkin into thin, even slices. Place on a cutting board and dust lightly with sugar.
For the filling, finely chop 6-8 sage leaves. Combine with mascarpone and finely grated Parmesan cheese. Season with salt and pepper.
Dust the table with flour. Roll out the dough into a rectangular layer 7–8 mm thick.
Line a baking sheet with paper. Transfer the dough to it. Spread the cheese filling in a thin layer, not going about 3 cm to the edges. Place the pumpkin slices beautifully on the filling.
Spread the egg beaten with a pinch of salt over the dough until smooth. Bake the biscuit in an oven preheated to 180 ° C for 25 minutes. or until ready.
Melt the butter in a heavy-bottomed saucepan. Place 5–7 sage leaves in the melted butter and fry for 1 minute, shaking the saucepan. Grease a finished cake, garnish with sage leaves, and serve warm.