Combine blueberries, water, sugar, cinnamon, and vanilla in a small saucepan over moderate heat. Stir until all the sugar has dissolved and the mixture starts to simmer. Simmer for seven minutes.

Add cornstarch and stir to combine. Keep stirring for a minute or two until the mixture thickens.

Once the mixture thickens, add the lemon zest and remove from the heat. Transfer blueberry mixture to an oval ramekin or small baking dish.

In a small bowl combine the granola and the agave. Top the blueberries with the granola mixture and a few scoops of ice cream. Serve and enjoy!