Other root veggies or cabbage or garlic or onions or anything else(!) can be added to this basic recipe to make a tasty and interesting medley.  Roasted vegetables are always sweeter than raw because the dry heat concentrates their innate sugars.

turnips, peeled and coarsley chopped or cut into wedges
olive oil
salt and pepper
dried thyme

Toss turnips with other ingredients.  Lay on a greased baking sheet and roast in the oven at 375 until tender and browned, about 45 minutes.