CAPER SAUCE
Is made by mixing a sufficient quantity of capers, and adding them to the melted butter, with a little of the liquor from the capers; where capers cannot be obtained, pickled nasturtiums make a very good substitute, or even green pickle minced and put with the butter..
Otto Wilhelm Thomé (1840-1925) Flora von Deutschland Österreich und der Schweiz 1885
Freshly picked capers