Have you ever eaten a kohlrabi? These little sputnik-shaped vegetables come in green or purple, can be eaten raw or cooked, and taste a lot like broccoli stems. The word kohlrabi is German for cabbage turnip (kohl as in cole-slaw, and rübe for turnip), though kohlrabi is more related to cabbage and cauliflower than to root vegetables. We usually eat them raw, just peeled, sliced and added to a salad, but they are also delicious cooked and are often used in Indian cuisine.
If the kohlrabi leaves are still attached to the bulb, trim the m and store separately. If the leaves are in good shape—firm and green—they can be cooked but will need to be used within a couple of days. The bulbs should be stored, unwashed, in a plastic bag. They will hold for about a week in the refrigerator.
Simple preparation: Tender, young kohlrabi is delicious eaten raw. Peel the outer skin with a paring knife. Slice, dice, or grate, and add to salads. Use on raw vegetable platters or serve with a creamy dip. Substitute in recipes calling for radishes. Grated kohlrabi can be added to slaw, but lightly salt it first and let stand for several minutes. Squeeze to remove any excess water before adding dressi ng. Kohlrabi can also be steamed or boiled. For this preparation don’t peel until after they are cooked. Steam or boil until bulbs are tender, peel skin, and season with butter, salt, and pepper, a cheese sauce, or just enjoy plain.
If the leaves attached to the kohlrabi bulb are fresh and green, they can be enjoyed as a cooked green. Wash the leaves and remove the ribs. Blanch in boiling water until just wilted, 3 to 5 minutes. Drain and squeeze excess water from leaves. Chop leaves, then sauté in a little olive oil or butter. Season with salt and pepper. Add a splash of vinegar or squeeze of fresh lemon juice.
From www.care2.com/greenliving/how-to-use-kohlrabi