Season the pork chops with salt and pepper and garlic powder. Heat a small bit of oil in a skillet large enough to fit your chops in one layer. Brown the chops on both sides over medium heat. If you're using the onion, take the chops out and brown the onion in the pan juices.
Stir the soup, Worcestershire and ketchup together in a small bowl, then pour over the chops. Bring to a simmer, cover and cook for 30-45 minutes (depending on how thick your chops are), until done.
The sauce goes great over mashed potatoes.