Melt spread in 2-quart saucepan over medium heat and cook walnuts 3 minutes or until golden. Stir in garlic and cook 30 seconds. Stir in sauce. Reduce heat to low and simmer, stirring occasionally, 3 minutes or until heated through. To serve, toss sauce with hot linguine. Sprinkle with additional chopped walnuts and garnish, if desired, with chopped fresh parsley.