Highly seasoned but not super spicy, this pork loin dish pairs sweet parsnips with cayenne and fresh ginger. Peppery watercress is added for serving and brings a fresh crunch.
2 medium sweet potatoes (1 pound total), peeled, halved, and cut into ½-inch pieces
4 medium carrots, cut into ½-inch pieces
2 medium parsnips, peeled and cut into ½-inch pieces
½ cup walnut halves
¼ cup honey
2 tablespoons extra-virgin olive oil
Coarse salt and ground pepper
3 to 5 sprigs thyme
Preheat oven to 375 degrees. In a 3-quart baking dish, toss together sweet potatoes, carrots, parsnips, walnuts, honey, and oil; season with salt and pepper. Top with thyme sprigs and roast until vegetables are browned at edges and tender when pierced with a knife, about 1 hour.