Some ways to roast pork sirloin are in an oven, on a grill or in a slow cooker. Pork sirloin is cut from the loin, located on the pig's back, and is a low-fat cut of meat that does not require special preparation or excessive cooking time to make tender. Pork sirloin and pork tenderloin are known colloquially as pork loin in many recipes.
For a simple oven-roasted pork sirloin, start with an oven preheated to 325 degrees Fahrenheit. Lightly flour the inside of an oven bag with 2 tablespoons of all purpose flour. Place a 2-pound pork sirloin in the oven bag. In a small bowl, blend 2/3 cup of packed light brown sugar, 1/4 cup of cinnamon applesauce, and 1 1/2 teaspoons of ground ginger. Pour the mixture over the sirloin. Seal the bag, and cut three or four small slits in the top. Cook the roast in the oven for one hour, or until the internal temperature is 145 F.
To make slow cooker barbecue pork sirloin, start by coating a 3-pound pork sirloin with 1 tablespoon of salt and 2 teaspoons of black pepper. Place the loin in a large slow cooker. Add a small minced onion and three cloves of minced garlic. Pour 8 ounces of honey barbecue sauce over the meat. Add two dashes of hot sauce, and stir to combine. Cover and cook on low for six to seven hours; the roast should shred easily with a fork when it's done. Add salt and pepper to taste.