| Combine in small sauce pan and bring to a boil. Reduce heat to medium and stir until sugar has completely dissolved. Let simmer for 5 minutes and then cool completely. Bring the raspberries, syrup, and lemon juice to a simmer in a heavy medium saucepan over low heat. Simmer, stirring occasionally, until the berries are very soft, about 8 minutes. Sprinkle the cornstarch over 2 teaspoons cold water and stir to dissolve. Pour into the simmering raspberry mixture. Cook, stirring occasionally, until the sauce thickens, about 5 minutes. Strain through a fine-mesh sieve into a bowl; discard the seeds. Cool completely, then cover and refrigerate until ready to use. |
