Cook in a large skillet over medium heat until crisp:
Transfer the bacon to a plate lined with paper towels to drain, and set aside. Spoon off all but 3 tablespoons of fat from the skillet. Increase the heat to medium-high and add cut side down:
Cook until browned on one side, about 7 minutes. Add:
Reduce the heat to medium and cook, stirring, until the leeks have softened, about 5 minutes. Chop and add the bacon along with:
Reduce the heat, cover the skillet, and simmer until the turnips are just tender, 15 to 20 minutes. Stir in: