PREHEAT oven to 400°F. Mix marinara sauce, water and oil in medium saucepan; bring just to boil on medium-high heat, stirring occasionally. Meanwhile, mix Parmesan cheese, parsley and garlic powder until well blended.
SPRAY 13x9-inch baking dish with cooking spray. Separate linguine noodles; place in prepared dish. Pour marinara sauce mixture over noodles; press noodles into sauce to completely coat noodles with sauce. Top with chicken; sprinkle with the Parmesan cheese mixture and mozzarella cheese. Cover tightly with foil.
BAKE 30 min. or until chicken is cooked through (170°F). Remove foil. Let stand 5 min. before serving.