Even if you’re not a gardener but have a generous one in your midst, or have stumbled upon some girthier zucchini specimens at the farmer’s market, you’re going to want to know what to do with them. Luckily, thanks to its thicker skin, you can store marrow in a cool, dry place for a couple of weeks, as you would with a butternut pumpkin, while you figure out what to do with it.