In a medium-sized saucepan, combine the berries, sugar and water. Bring the mixture to a boil, then mash and stir with a potato masher while boiling for 2 minutes, or until the berries are soft and plump.
If you don't like seeds or chunks in your syrup, strain the syrup through cheesecloth to remove the seeds then return to a clean saucepan.
In a small bowl, combine the cornstarch and cold water and stir until the cornstarch is completely dissolved, then stir into the berry mixture along with the lemon juice and bring to a boil. Boil for 1 minute, or until the mixture thickens slightly.
Remove the syrup from the heat and let it cool for a few minutes before serving on pancakes, waffles, French toast, or ice cream. Enjoy!