Turnips are totally underrated! They are cheap and packed with nutrients, but somehow not as in-fashion as brussel sprouts or kale these days. I hope they make a come back because the turnips make one cup of this soup "High In" fiber, calcium (yup!) and Vitamins A and C. This recipe is a bit indulgent using half-and-half - use low fat or skim milk to cut the fat. —Vegetarianized.com
Cut the turnips from the greens and trim each end. Toss with 1 Tbsp EVOO, 2-3 sprigs of fresh thyme and 1/2 tsp salt in a large bowl. Spread out in a single layer onto a baking sheet and roast for 20 minutes, turning over at the 10-minute mark, and remove to cool.
Meanwhile in a soup pot, heat leeks, garlic, remaining 1/2 tsp salt, 1/8 tsp Chinese Five Spice Powder and butter over medium-low heat. Stir every few minutes and make sure the leeks get no brown on them. Cook down until turnips are ready, about 15-20 minutes total.
When turnips are done, discard the thyme sprigs and add them to the leeks. Add the potatoes, stock and half-and-half as well. Bring to a boil over medium-high heat, then turn to medium-low and simmer 20 minutes until the potatoes are very soft.
Meanwhile, remove the stems from the turnip greens and chop coarsely. In a skillet over medium heat, add remaining 1/2 Tbsp EVOO. When the EVOO is hot, add greens, 1/2 tsp chopped thyme and a pinch of Chinese Five Spice Powder. Cook the greens down until tender and remove from the heat.
Remove the soup from the heat and puree in batches in a blender or food processing until very smooth. BE CAREFUL WITH HOT LIQUIDS! Strain through a colander or chinoise and add the vinegar. Adjust any seasonings and serve hot with a portion of greens on top.