Homemade jam feels like sunshine in a jar. When I make a batch of this blueberry jam recipe in my kitchen, I want more than good flavor. I want a safe, reliable, research-based method that I can trust ...

For years I researched the art and craft of preserving summer fruit, but I could never bring myself to go ahead and try it myself. What if I did something wrong? What if my jars exploded in the heat?