In small bowl, combine Hellmann's® or Best Foods® Light Mayonnaise, vinegar, soy sauce, honey, ginger and salt. Reserve 1/4 cup mayonnaise mixture for grilling. Stir orange juice into remaining mayonnaise mixture; reserve for greens.
Grill or broil chicken, brushing with reserved 1/4 cup mayonnaise mixture, 12 minutes or until chicken is thoroughly cooked, turning once.
In large bowl, toss lettuce and watercress with reserved orange juice mixture. To serve, arrange sliced chicken over greens, then top with snow peas and oranges.