Meanwhile, make your dressing: mix the garlic, anchovies, capers, parsley, oil, vinegar and pepper, and keep at the ready. Fifteen minutes before the pork is done cook your turnips in boiling salted water. When cooked add the greens then drain straight away. Place these into a serving bowl, dress, and toss so all get to know the dressing. Remove the pork from the oven; it will hold its heat well and will enjoy a rest if things are a little out of synch.