Black Currant Sorbet

1 quart fresh black currants, or frozen or canned
juice of 3 lemons
1 cup + 2 Tbsp. sugar
3/4 cup water
Creme de cassis (optional)

Puree black currants and combine with lemon juice, sugar, and water.
Freeze according to instructions until smooth, firm, and frozen.
If desired, pour 1 Tbsp. creme de cassis over each serving.