Start by preheating your oven to 350 degrees. Then butterfly your pork roast. If you don’t want to bother with this step yourself just ask your butcher to do it for you. Otherwise lay the roast out on your broad and with a sharp knife cut into the roast rolling it away from your blade like unrolling a rug
. If you have any really thick spots feel free to even it up by pounding the fat parts out with a mallet. Set the roast aside.