Ah summer, the season of fresh tomatoes, corn, Popsicles, and potlucks when you’re expected to bring a dish -- but what? What stands up well to travel, doesn’t need refrigeration, and tastes good at room temperature (or warmer)? Forget delicate leafy salads and fussy desserts. See what our food editors make for Memorial Day and potlucks throughout the sultry weather. "Deliciously simple, this make-ahead soup takes only 20 minutes to prepare and can easily be multiplied to feed a crowd," says senior associate food editor Greg Lofts.