Question: can you use diced tomatoes instead of tomato paste?
Answer: Tomato Paste Substitute From Canned Tomatoes You can also use a can of whole or diced tomatoes to make tomato paste. Blend a 14.5-ounce can of tomatoes in a blender or food processor until smooth. ... You should get about 2/3 cup or 6 ounces of tomato paste from a 14.5-ounce can of tomatoes.