Rub the pork loin with olive oil & place in a roasting pan. Drape slices of bacon over the top. Combine the chicken stock, rosemary, thyme, basil, sage, & garlic. Pour over the roast. Place onions around the sides. Cover with the lid or aluminum foil.
Bake for 1 hour & 30 minutes. Remove the lid or foil, & continue to bake for 30 minutes, or until the bacon is browned.