Chop the chocolate and melt over a warm water bath. Chop the walnuts. Mix cornflakes, nuts and chocolate. Press the mixture as a base into an oiled springform pan (20 cm Ø) and chill for about 30 minutes.
Soak gelatine in cold water. Mix cream cheese, quark, sugar and vanilla pulp. Whip 125 g cream with the whisks of the hand mixer until stiff. Squeeze the gelatine, dissolve and stir in 4 tbsp. of the cream cheese cream, stir into the remaining cream cheese cream.
When it starts to get firm, carefully fold in the cream.
Carefully remove the base from the springform pan and place on a plate. Spread the cranberries on the base. Spread the cream cheese cream in a dome-shaped pattern and smooth it down. Chill for at least 2 hours.
Whip the rest of the cream until stiff, allowing the vanillin sugar to trickle in. Pour the cream into a piping bag with a small perforated spout. Spray small tips close together on the dome cake. Dust with cinnamon if necessary.