I mentioned in my last post that I would upload a PDF document of how I do my passata. I have put this together, hopefully not leaving out anything. I use a manual plastic machine that is made in Italy and it is great for general home production. If you do more that 4 boxes at a time you may want to think about upgrading to an electric processor but I quite like the manual method. If you have any questions or find anything glaringly wrong please let me know.