Dissolve staghorn salt in hot water, chop up the Bambergs in the food processor or rub by hand. Chop the orange peel and lemon peel and mix with 100 g hazelnuts. Mix all ingredients well and let stand for 15 minutes. Distribute the mixture evenly on the wafer (7 cm diameter).
Put in the oven at 160 ° and bake for about 30 minutes. Let cool and cover with chocolate icing.