Karljohansvamp (Boletus edulis) or in English cep, penny bun, porcino or porcini. Introduced to the Swedish cuisine by the, from France, imported king, Karl XIV Johan. From then on it has been called Karljohansvamp.
Karl XIV Johan was born 1736 as Jean Bernadotte in Pau, France. He became king of Sweden and Norway in 1818. On the throne until 1844 when he passed away at Stockholm Castle.
Eat like a king, have some mushroom. Ha de Gött!