Bring Pasta Sauce, clams with juice, and red pepper flakes to a boil in 3-quart saucepan. Reduce heat and simmer uncovered, stirring occasionally, 5 minutes. To serve, spoon clam sauce over hot linguine. Garnish, if desired, with grated Parmesan cheese.
Also terrific with Ragu Robusto Pasta Sauce. Cost per recipe*: $13.40. Cost per serving*: $2.23. *Based on average retail prices at national supermarkets.