Good-to-Your-Gut Ketchup

• 1½ cups no-salt-added tomato purée
• ¼ cup white wine vinegar or cider vinegar
• 2

Put all the ingredients in a deep, medium saucepan (preferably nonstick) and bring to a simmer over medium heat. Decrease the heat to medium-low, partially cover to minimize splatters, and simmer, stirring occasionally, until reduced and thickened, about 40 minutes. Adjust the heat as necessary to maintain a simmer, and stir more frequently toward the end when the ketchup has begun to thicken.