Melt your butter in a skillet over medium-high heat. Add the turnip slices and sauté for a few minutes until they start to brown. Add a splash of water or broth, stir, and cover to steam-cook the turnips until tender, about 8 minutes. Check and stir them periodically. They should be golden-brown in places, almost caramelizing, when they are done, and tender all the way through. Add your soy sauce directly to the pan and sprinkle on your parsley. Eat!