Use a 14-cup food processor or a high-speed blender to puree the sauce. Add the tomatoes, oil, salt, dried oregano, and sugar. Blend until smooth.
Empty the tomato sauce into a mason jar or an airtight container.
Store in the refrigerator for up to four days. Freeze smaller portions and defrost before use. Frozen pizza sauce will last up to four months.
Notes
Note 1: Whole canned tomatoes will also work. Note 2: Swap in Italian seasoning if wanted.Low FODMAP Notes: Low FODMAP ingredient information is based on the Monash University Food App and FODMAP Friendly App testing results.