Cook noodles according to package directions. Drain, rinse with cool water and place in a large bowl. Add chicken, sprouts, peppers, onions and snap peas and toss to combine. Refrigerate for 10 to 20 minutes or until chilled.
In a small bowl, stir together mayonnaise, lemon juice, soy sauce, ginger and salt. Pour dressing over noodle salad and toss to coat evenly.