3 ounce sugar (or more, depending on acidity of the berries)
1 tablespoon lemon juice
5 ounce blueberries (or cranberries)
Directions
Place the berries and water in a saucepan, bring to a boil, cover and cook for 5 minutes.
Pass the liquid through a chinois and return to the saucepan. Add the sugar and lemon juice, then bring to a simmer, stirring constantly, and remove from the heat.
Pass through a chinois again, let cool and refrigerate.