Heat oil in 12-inch skillet or Dutch oven over medium-high heat until hot. Add pork chops; cook 2 to 3 minutes on each side or until browned. Remove pork chops from skillet.
Add 1/2 cup of the pineapple liquid, brown sugar, salt and cinnamon to same skillet; blend well. Reserve remaining pineapple liquid. Add sweet potatoes to skillet; turn to coat with liquid. Add pork chops. Bring to a boil. Reduce heat to low; cover and simmer 15 to 25 minutes or until potatoes are tender.
Stir in bell pepper and pineapple chunks. Cover; simmer an additional 5 minutes. Transfer pork chops to warm platter.
In small bowl, stir cornstarch into remaining pineapple liquid until dissolved. Gradually stir into mixture in skillet. Cook and stir over medium-high heat until sauce is bubbly and thickened. Spoon over pork chops.