Enjoy "Dinner for 4" at Bethesda's first upscale restaurant to offer a nutritionally balanced menu.  Working in conjunction with Cynthia Payne, a local nutritionist, Rock Creek has developed a menu that will allow diners to experience a tasteful dining experience for approximately 600 calories. The food preparation and presentation is orchestrated by Chef Fred Przyborowski formerly of the Kennedy Center Roof Terrace Restaurant and Ardeo and Bardeo in Cleveland Park.  Rock Creek's goal, according to owners Judy Hammerschmidt and Tom Williams, is to create a dining experience that changes the way people eat by paying attention to ingredients and portions.