can i use diced tomatoes instead of tomato paste?
Tomato Paste Substitute From Canned Tomatoes You can also use a can of whole or diced tomatoes to make tomato paste. ... You should get about 2/3 cup or 6 ounces of tomato paste from a 14.5-ounce can of tomatoes. You can also use less of the canned tomatoes to make less tomato paste.