For the currant-raspberry jam, wash the currant and remove the stems. Sort the raspberries and put them into a large pot with the currants. Puree with a hand blender, mix with citric acid and preserving sugar. Bring to the boil and boil for 8 minutes, then immediately fill the currant-raspberry jam into clean jars and seal.
Preparation Tip:
Flavor the currant-raspberry jam with the pulp of a vanilla bean.