Say you're going to a potluck, picnic, or barbecue. What do you bring? A grain salad is always a brilliant choice. Not only can it be made completely ahead, but it holds up beautifully. Plus, it's easy to customize because the flavor combinations are virtually endless; grains are like a blank canvas, so they go well with just about any ingredient. And best of all, the method couldn't be simpler: Just cook the grain of your choice, then toss with a homemade vinaigrette and your favorite veggies, fruits, beans, nuts and other add-ins.