Nutritionally rich and delicately flavored, napa cabbage lends itself to a wide variety of culinary creations. Here it’s wrapped around a savory Asian-inspired filling. Native to China, napa cabbage, also known as Chinese or celery cabbage, has a mild, sweet flavor that’s often described as a cross between cabbage, celery, and iceberg lettuce. This hearty vegetable is available year-round, though it grows best in cooler weather when the days are short. And like most cabbage, it’s low in calo…