Melt margarine in medium saucepan over medium-high heat and cook tomatoes, stirring occasionally, until most of the juice is thickened slightly, about 8 minutes.
Stir in milks and Knorr® Parma Rosa sauce mix. Bring to a boil over high heat. Reduce heat to low and simmer, stirring frequently, until thickened, about about 4 minutes. Stir in tomato sauce and heat through.