# Method:
01 - Rinse the black currants thoroughly under cold water and remove any stems or debris.
02 - In a medium saucepan, combine black currants and water. Bring to a gentle simmer over medium heat and cook for 10-12 minutes, stirring occasionally, until the currants have burst and released their juices.
03 - Remove from heat and allow the mixture to cool slightly. Pass the mixture through a fine-mesh sieve or cheesecloth into a clean bowl, pressing firmly to extract as much juice as possible. Discard the solids.
04 - Return the strained juice to the saucepan. Add the sugar and optional lemon juice. Stir until the sugar is completely dissolved.
05 - Bring the mixture to a gentle boil, then reduce heat and simmer for 10-15 minutes, stirring occasionally, until the syrup thickens slightly.
06 - Remove from heat and allow the syrup to cool. Pour into sterilized glass bottles or jars and seal.
07 - Store in the refrigerator for up to 1 month.