While the biscuit is cooling, prepare the cream. First, prepare the pumpkin puree. Cut the pumpkin into cubes, pour a couple of tablespoons of water, put it in a slow cooker, cover with a lid and cook for a couple for 7 minutes at 850 watts, stirring once in the process. Then transfer to a small saucepan, whisk with an immersion blender. We also put all the ingredients here, except butter. Mix everything, put it on a small fire and cook the custard, stirring constantly. Cover the cream with plastic wrap so that it touches, set aside and let cool to room temperature.