Homemade Tomato Paste Recipes

Steps:

• Stir to combine the tomatoes with the olive oil and salt in a large Dutch oven. Cover and cook over medium heat until the tomatoes give up their juices and the skins start to peel off, about 10 minutes.
• Let cool for a few minutes, then pass the tomatoes and their juices through a food mill fitted with the finest disk into a bowl. (If you don't have a food mill, you can press through a sieve.) Transfer the puree to the Dutch oven. Bring to a rapid simmer over medium-high heat and cook, stirring occasionally, until beginning to thicken and is reduced by about half, about 1 hour. Lower the heat so the puree is barely bubbling and continue to cook, stirring every 10 minutes or so, until very thick, 30 minutes to 1 hour more, depending on how juicy your tomatoes were. Once the puree is quite thick, keep an eye on it and cook, stirring frequently, until brick red and completely dried out (but not burnt), 10 to 15 minutes more. Let cool completely.
• Transfer to a nonreactive jar and cover with a thin film of olive oil to prevent a crust from forming. Cover and store in the refrigerator for up to 3 weeks. For longer storage, transfer to ice cube trays and freeze. Once frozen, remove and transfer the cubes to an airtight container and freeze for up to 3 months.