In small bowl, combine apple slices and apple cider vinaigrette. Cover and marinate in refrigerator for at least 2 and up to 6 hours.
In blender, purée all ingredients until smooth.
In medium bowl, toss together spinach and strawberry Champagne vinaigrette. Mound 1 cup dressed spinach on each plate. With fork or slotted spoon, lift apples from marinade and scatter 1/4 cup over each salad. Top each salad with 1 tablespoon cheese, 1 tablespoon dried cranberries, and 1 teaspoon walnuts.