This is one hearty salad. It's also a symphony of flavors and textures, where mellow, crunchy romaine meets beautifully bitter radicchio. Garlic flavors are layered in--both raw and grilled--as are acids: buttermilk, lemon, vinegar. A simple tomato-basil experience is tucked right in there, too. Serve with the simplest of grilled meats or chicken.