Mix together the rosemary, garlic, salt and pepper. Make deep cuts into the pork roast, stuff the incisions with the garlic mixture and spread any remaining mixture over the entire surface of the meat.

It is recommended you tie the roast with some cooking string in order to maintain its neat, compact shape and ensure even cooking; if it is a single-piece roast, then the tying is optional. Pour the oil into a large enough saucepan and heat over a medium flame. Add the pork roast and roll it around until you’ve browned the piece on all sides. Now place the roast on a baking dish (the dish/pan should not be too big otherwise the juices will dry out before you can use them) and place it into the oven to cook at about 350 °F (180°C) for about an hour and a half. Check the roast periodically and baste with the pan juices, rolling the roast around every once in a while.

If you have a meat thermometer, the roast is done once the thickest part of the roast has reached 150-155 °F. Since we don’t have one, our method is to make a hole in the thickest part of the roast with a long thin metal toothpick and remove it; the roast is done when no pink liquid comes out of the hole.

Remove the roast to a cutting board, cover loosely with aluminium foil and let stand for 15 minutes. Slice the meat and serve with the pan juices.