Mmm, young turnip greens are really really really good in salad, especially if you've also got young dandilions, carrot thinnings, and other assorted edible yard weeds....
or cook them like any other green. I like greens sauteed in a little olive oil with onions and garlic, salt, pepper, maybe a little bit of red pepper flakes. Throw in some slivered toasted almonds or pecans to make it a little fancier. I always sautee the onions and garlic first until the onions are tender and translucent before adding the greens.