Hello All. I'm a newbie and only yesterday finished reading PB. While researching primal recipes, I happened upon one that mentioned tomato paste. First, let me say, I am a tomato fanatic. I will certainly be making plenty of recipes which include tomatoes. My question is---can I use canned tomatoes seeing as there will be preservatives, probably won't be organic, etc? What is the right thing to do and what are my options if I can't afford all of the organic things right now? -says "just-out-of-college" student-