You will need:
Pour 2 cups water in pan. Add tomato paste, diced tomatoes and Sauce packet. Stir until well blended and bring to a boil.
Reduce heat and simmer, stirring occasionally for 10 minutes.
For thinner sauce, add 1/4 to 1/2 cup water a little at a time until desired consistency is obtained.
Serve over cooked and well drained pasta.