There are cast iron purists that cringe at the thought of lining a dutch oven with anything more than their favorite oil or shortening. Some consider it “cheating” if one is placing anything between the food being prepared and the well seasoned cast iron bottom of a dutch oven. There are folks who say when one lines a dutch oven, the food doesn’t taste nearly as well as when cooked directly on the iron. There are those who believe that eating food cooked in cast iron can help with iron deficiency and that liners reduce that benefit. At the same time, some cooks would never use any tomato-based product in…