Heat oil in 10- inch skillet over medium-high heat. Sprinkle salt and pepper over pork. Brown pork in oil about 6 minutes, turning occasionally, until browned on all sides.
Place sweet potatoes, onion and garlic in 3-1/2 to 6- quart crockpot. Place pork on vegetables. Pour broth over pork. Cover and cook on low heat setting 8 hours or until pork and vegetables are tender.
To serve, remove pork from crockpot and place on platter surrounded by sweet potatoes and onion.