Make a shortcrust pastry from flour, sugar, butter, salt and an egg and refrigerate for 30 minutes.
Cook the pumpkin meat on the baking sheet in a hot oven at 200 degrees for about 25 minutes. Then let cool down a bit. Then puree.
Mix the puree with the brown sugar, almonds, cinnamon and egg yolk. Beat egg whites until stiff and fold in carefully.
Grease a springform pan. Roll out the shortcrust pastry and distribute it in the pan. Form an approx. 3 cm high border. Pour in the mixture and bake in a hot oven at 200 degrees for about 30 minutes.