We love heirloom tomatoes. They are so tasty during the summer. Lauren Braun Costello, the co-author of Notes on Cooking, explains how to buy and store heirloom tomatoes in this short video. She recommends buying heirloom tomatoes from your local farmer's market. She also says the best wayt to buy tomatoes is to but them on the vine. Lauren Braun Costello also warns not to refrigerate heirloom tomatoes (before cutting them open) and to keep them out of the sun. Take a look: