Second place winner in our 1996 Old Farmer's Almanac recipe contest
COMBINE DRESSING ingredients; mix until well blended. Combine the watercress, radicchio, and parsley with half the dressing. Arrange on 6 salad plates. Toss the potatoes and apples with the rest of the dressing. Place on top of greens. Top with bacon and nuts. Garnish with lemon twists, if desired.