To prepare the dressing: add all of the dressing ingredients up to and including the curry powder into the bowl of a food processor, and process until everything is well combined and smooth; with the processor running, slowly drizzle in the oil and continue to process until the vinaigrette is well emulsified and blended. (This makes about 1 cup of dressing, so you may have additional dressing left over which you can store in the fridge.)
To prepare the apple salad: to a large bowl add the frisee, arugula, walnuts and about half of the matchstick-sliced apples, and drizzle lightly with some of the spiced cider vinaigrette; add equal portions of the salad to bowls or plates (or onto a large serving platter) and then top each salad with equal portions of the remaining matchstick-sliced apples and another generous drizzle of the vinaigrette.
Serve as is, or garnish with a few additional candied walnuts.
