- 8 pounds fresh tomatoes (such as plum or San Marzano)
- 2 large sweet onions, chopped
- 6 garlic cloves, chopped
- 1 (6-oz.) can tomato paste
- 1/4 cup white wine vinegar
- 2 tablespoons sugar
- 1 1/2 tablespoons dried Italian seasoning
- 1 tablespoon kosher salt
- 1 teaspoon freshly ground black pepper
- 1/2 cup chopped fresh basil
- 1 tablespoon fresh thyme leaves
- Cut a small “X” in bottom of each tomato.
- Bring 8 qt. water to a boil in a large stockpot; add tomatoes, and boil 30 to 60 seconds or until peel begins to separate from tomato flesh. Remove with a slotted spoon. Rinse immediately with cold running water, or plunge into ice water to stop the cooking process; drain. Peel tomatoes, and discard skin. Cut tomatoes in half, and gently squeeze to remove seeds. Coarsely chop tomatoes.
- Stir together onions, next 7 ingredients, and chopped tomatoes in a 7-qt. slow cooker. Cover and cook on HIGH 4 to 5 hours or until tomatoes have broken down and are very soft. Cool 20 minutes. Stir in basil and thyme.
- Process mixture with a handheld blender until smooth, or process mixture, in batches, in a food processor or blender. Season with salt and pepper.