Preparation: Cook a porridge from the milk, the moonamine and a tablespoon of sugar. Let cool, stir again and again so that no skin forms.
Mix the butter with the sugar for 5 minutes until foamy, then carefully stir the ground walnuts and the mondamine porridge into the cream.
Place the ring of a springform pan upside down on a larger plate. Dip the ladyfingers individually and briefly in the coffee with rum - break into 3-4 parts, place in the ring until the base is well covered. Spread 1/4 of the cream on it. This results in 3 layers of ladyfingers and 3 layers of cream, top with cream.
Decorate with walnut halves and put in the refrigerator for one night.
Before serving, carefully loosen the springform ring with a wet knife, open the buckle and remove it.