Cukes for Health: Cucumbers are so often an after thought in salads, mild in flavor, and in almost all water. But they’re also surprisingly nutritious, from skin to seed. They’re a great source of Vitamin K and a pretty good source of Vitamin C, magnesium, potassium, and manganese. This recipe is a kind of “poor man’s” sushi, or, rather, a sushi anyone anywhere can make and enjoy! They’re refreshing and light and make for great finger food or just a nifty snack.