Chicken in wine sauce. Peppery pasta salad. Salmon with dill. It seems that healthy eating has come a long way from cottage cheese and celery sticks, says Jackie Newgent, R.D., a spokesperson for the American Dietetic Association and a nutritional consultant in New York City. Newgent offers these tasty, low-calorie ways to spice up your eating without spoiling your diet. Get sweet on sour. Adding an acid such as wine, fruit juice, or vinegar to food can give it an intense taste boost. "It can be something as simple as adding balsamic vinegar to a raw tomato, which brings out its flavor…