Melt 1 tablespoon Spread in large nonstick skillet over medium-high heat and cook chicken, stirring occasionally, until chicken is thoroughly cooked, about 5 minutes. Remove chicken and set aside.
Melt remaining 1 tablespoon Spread in same skillet and cook mushrooms, stirring occasionally, until golden, about 5 minutes. Add milk, Knorr(R) Rice Sides(TM) - Chicken flavor and peas and prepare according to package directions.
Stir in chicken, sour cream and 2 tablespoons Parmesan cheese; heat through. Serve sprinkled with remaining Parmesan cheese. Garnish, if desired, with chopped parsley and cracked black pepper.