The pumpkin is grated. Finely chop the walnuts. In a large bowl, mix the walnuts, grated pumpkin, sugar and breadcrumbs. Take 2 sheets and grease with melted butter between them. Put the filling on the crusts, roll them up and arrange them in a baking dish. In a deep container, mix sparkling water and
CREMIO crème for whipping. Pour the pumpkin with the resulting mixture. Bake in a preheated oven at 210° C for 35-40 minutes, placing the tray closer to the lower oven.