Blueberry Lemon Sauce

I was making Lemon Poppyseed waffles and wanted a blueberry topping for them.  This sauce worked well and the hint of cinnamon added a nice touch.  The leftovers are going to top some vanilla bean ice cream for dessert. 

Blueberry Lemon Sauce

1/3 cup sugar
1/3 cup water
2 tsp cornstarch
10 oz blueberries, fresh or frozen
1/2 tsp lemon zest
1 tbsp. lemon juice
1 dash cinnamon

Whisk together the sugar, water and cornstarch in a small saucepan.  Add in the blueberries, lemon juice and zest and bring to a boil.  Stir until the sauce thickens, remove from heat and stir in the cinnamon.  Serve warm or cold.