Some vegetables that start with the letter "K" are kale, kohlrabi and kelp. Kale and kohlrabi are both members of the brassica family, and kelp is a sea vegetable belonging to the seaweed family.
The leaves of curly kale are crimped and feature a dark, gray-green color. Like other vegetables, it has no cholesterol and is high in B complex vitamins and iron. Kohlrabi is prized for its stem, which is round and can be white, purple or pale green. It's best eaten when small and young. Its leaves can be used as greens. Kelp is used extensively in Japanese and other Asian cuisines.