Begin by preheating your oven to 400 F.
In a mixing bowl, combine minced garlic and chopped rosemary leaves with 2 tablespoons of cooking fat. Add sea salt and freshly ground black pepper to taste.
4 cloves garlic, 4 teaspoon fresh rosemary leaves, 3 tablespoon cooking fat, Sea salt and black pepper
Take the mixture and rub it all over the pork roast. Place the roast in a roasting pan with the fat side facing down.
2 ½ lb boneless pork loin roast
Put the roasting pan in the oven and roast for 30 minutes. After 30 minutes, flip the roast over so that the fat side is facing up. Add the additional rosemary to the pan. Roast for another 25 minutes, or until the pork is well cooked.
2 whole rosemary sprigs
Once the roast is done, take it out of the oven and set it aside to rest for about 10 minutes.
While the pork is resting, place the roasting pan on the stove top over medium heat. Remove the rosemary sprigs, and then whisk in about 1 tablespoon of cooking fat to the liquid.
To serve, slice the pork roast and drizzle the hot cooking liquid from the roasting pan over the top as the sauce.