Step 1Combine the rice vinegar, cranberry juice, cranberries, shallot, sugar, rosemary, olive oil and salt and pepper to taste. Let the dressing stand for the flavors to meld.
Step 2Meanwhile, cut the pear into quarters then core and slice. Place the slices in a shallow dish filled with water and the juice of half a lemon; the liquid should cover the fruit. Cut the apple into quarters, core and slice. Place the slices in a shallow dish with water and the juice of the remaining lemon half to cover.
Step 3Just before serving, drain the pears and apples. Toss together in a large bowl with the endive and salad greens. Arrange the salad on a platter and sprinkle with the toasted walnuts. Serve the dressing alongside.