Greens are to soul food what tomatoes are to Italian cuisine: a culinary sine qua non. Indeed, every soul food place in existence has its take on this Southern-born side dish, sometimes just using collards and sometimes mixing them with other leafy greens, such as kale, turnip, and/or mustard greens. Our complaint regarding those served at many soul food joints in the Valley is the over-use of salt, which overpowers the savory taste of this boiled vegetation, and kills any delight to be had from the "pot likker," the juice resulting from stewing the greens with a bit of ham added for flavor. Mrs. White's doesn't make this mistake. Its mixture of collards and mustard greens is absent excess sodium, and thus is the perfect accompaniment to its golden yellow cornbread, which crumbles so effortlessly over the pot likker remnants. It's difficult to overestimate the importance of a good mess of greens. For soul food aficionados, it's the one item sure to draw you back to an eatery, over and over again. And it's one of the many reasons we love Mrs. White's. Other soul food purveyors should pay heed! Spare our high blood pressure and ease up on yon salt shaker. Try Mrs. White's, then go and do likewise, ladies and gents. Readers' Choice: Souper Salad