Put some parchment paper over a baking tray and place the pork roast over. Drizzle the olive oil over the roast and add all of the spices over the roast. With your hands, massage the spices into the roast making sure to coat it perfectly everywhere. Make sure that the fat or skin is facing up so that it can get nice and crispy in the oven.
Place in the oven and bake for 70 minutes, or until a thermometer inserted in the middle of the roast registers at 80C/170F. Take it out of the oven, let rest for 10 minutes, and it's ready to cut!
My pork roast was 560g/1.2lbs/20oz so it was a pretty small sized one. If you have a bigger roast, you'll need to cook it much longer. Just cook it until it registers at 80c/170F and you'll be fine!