I need to print this out for myself, along with the directions for a pork tenderloin. Got my pork loin cooking in the oven as I type out this text. https://addapinch.com/how-to-cook-the-most-tender-pork-sirloin-recipe Reply. Remove the pork loin filet from the package, and cut it into slices roughly 1-inch thick. My husband loves a good roast and he picke up the pork loin because it was on sale. Why Not Try? 45 minutes at 220°C (fan)/475°F/gas mark 9 then 20 minutes per 500g at 160°C (fan)/350°F/gas mark 4. Thank you for clear directions. You never know what cut of meat is going to be on sale! Christine Pittman says: May 30, 2018 at 11:37 am . General guide to pork loin joint cooking times – this is a guide only and for best results use a meat thermometer. https://www.farmison.com/community/recipe/how-to-cook-flat-loin-of-pork Place each slice between two pieces of waxed paper or plastic wrap, and use a meat mallet or the bottom of a small, heavy frying pan to flatten them until they are closer to 3/4-inch thick.