Preheat the oven to 180 degrees C. Place the turnips, sweet potato, fennel and potatoes in a shallow baking dish, add the olive oil and toss to coat.
Roast the vegies in the oven for 35 minutes, or until tender.
Meanwhile, make the dressing. Pour the honey and vinegar into a saucepan, add the cloves and simmer. Remove the cloves and discard then whisk in the olive oil.
Remove from the oven and allow to cool slightly. Place in a serving bowl and add the radishes, artichokes and watercress.
Pour the dressing over the vegetables, toss and season with salt and pepper.