01 - In a medium saucepan, combine the cranberries, granulated sugar, and water.
02 - Set the saucepan over medium-high heat and bring to a boil, stirring occasionally until the sugar fully dissolves.
03 - Reduce the heat to low and simmer for 15 to 20 minutes, until the cranberries have burst and the mixture has thickened to a syrupy consistency.
04 - Remove the saucepan from heat. Stir in the freshly squeezed lemon juice until evenly incorporated.
05 - Pour the mixture through a fine-mesh sieve set over a heatproof bowl. Press the solids firmly with the back of a spoon to extract as much liquid as possible. Discard the solids.
06 - Allow the syrup to cool to room temperature, then transfer to a clean glass bottle or jar. Refrigerate and use within 2 weeks.