Pizza Sauce

Directions

1. 1
   ["Make the tomato puree: Cut the tomatoes into quarters, and pass through a food mill or Victorio strainer.", "If you do not have a food mill or Victorio strainer, blanch, peel, core, seed and chop the tomatoes.", "Place in a colander and let stand for 15 minutes.", "Discard liquid and puree tomatoes in a food processor fitted with a metal blade.", "Measure out 13 cups of the tomato puree.", "If you have more than 13 cups, save or freeze the remainder for use in another recipe.", "Place half of the tomato puree in a large stainless steel pot.", "Bring to a boil over high heat, stirring occasionally.", "Maintaining a constant boil, add the remaining tomato puree, 1 cup a a time.", "Stir in the lemon juice, oregano, pepper, salt, and garlic powder.", "Boil hard, stirring frequently, until the mixture is the consistency of a thin commercial sauce, about 15 minutes.", "Remove from heat.", "Ladle the sauce into hot jars, leaving 1/2 inch headspace.", "Wipe the rims of the jars with damp paper towels to remove any sauce which got on the rims or the threads.", "Place the lids and the bands on the jars, just tightening the bands fingertip tight.", "Process in a boiling water bath for 35 minutes, then remove and let sit, undisturbed, for at least 12 hours before checking seals.", "It is important to let them sit undisturbed for 12 hours because the sealing compound on the lids is still cooling and hardening, completing the seal.", "While the jars cool, you will hear a \"plink\"" type sound from each jar - this is the jars completing the vacuum seal as the final air escapes the jar.""