Though i’m not a vegetarian, summertime piques my partiality for grill-ready burgers created from beans (or lentils), grains and vegetables. The trick to a homemade veggie burger that won’t fall to pieces on the barbecue is a simple three-step process: cook, chill and grill. This means that the night (or morning) before, you make the burger mix, brown the patties in a skillet and then chill to set. These can also be made in larger batches and frozen—handy for spontaneous types. Since bean burgers appreciate a bit of sauce for extra flavor and moisture, whip up two of my favorite toppers to really gild this legume lily.