Blueberry Sauce

Procedure

1. Put the sugar in a heavy saucepan. Heat until the sugar melts and then caramelizes to a rich golden brown.
2. Remove the pan from heat and add the water. Because the pan is very hot, the water will boil immediately, so be careful to avoid being scalded by steam.
3. Simmer until the caramelized sugar is dissolved.
4. Add the lemon