In a medium bowl gently toss figs with 2 tablespoons vinaigrette dressing; marinate for 10 minutes. Grill under broiler on high heat just until lightly browned; set aside.
Meanwhile, put watercress, mandarin oranges, remaining 2 tablespoons vinaigrette dressing, chives, thyme and tarragon in a salad bowl. Toss gently. Arrange on salad plates, top with figs, pine nuts, feta cheese, if desired, and pepper.
Makes 4 servings.
Nutrition information per serving (without feta): 220 cal., 13 g total fat (1.5 g saturated), 0 mg chol., 140 mg sodium, 25 g total carbo., 3 g dietary fiber, 3 g pro.