For dressing, in a blender container or food processor bowl combine the pear, white wine vinegar or cider vinegar, white wine Worcestershire sauce or Worcestershire sauce, and pepper. Cover and blend or process until smooth.
In a bowl toss together the spinach, mushrooms, and basil leaves. Add the beef strips and orange or mandarin orange sections. Toss lightly to mix. Add the dressing; toss to mix. Divide salad mixture between 2 individual salad bowls or plates. Makes 2 servings.
Choose sweet muffins to serve with this salad.