Bring water and Spread to a boil in medium saucepan over medium heat. Stir in Knorr® Pasta Sides™ - Chicken flavor and vegetables. Continue boiling over medium heat, stirring occasionally, until noodles are tender, about 7 minutes. Stir in chicken and cheese.
Turn into 1-1/2-quart casserole; sprinkle with onions. Broil until golden, about 1 minute. Garnish, if desired, with chopped parsley.