In this video, learn how to turn a surplus of fresh blueberries into something that will last all year long. The blueberry jam recipe in this video is simple to make, and the delicious simple flavor of sweet blueberries shines through. Simply mix blueberries, sugar, lemon juice, and cinnamon in a saucepan and cook them, stirring constantly, over medium heat until the mixture thickens, and that only takes about 30 minutes.