Pat the pork chops dry and season both sides with half the salt and pepper.
Heat 1 tablespoon of oil in a large oven-safe skillet over medium-high heat. Sear the chops for 2 to 3 minutes per side, then transfer them to a plate.
Lower the heat to medium and add the remaining oil. Cook the onions with the remaining salt, pepper, and thyme for 10 to 12 minutes, stirring often, until soft and deeply golden.
Sprinkle the flour over the onions and stir for 1 minute. Slowly pour in the broth and Worcestershire sauce, scraping up browned bits, and simmer until lightly thickened.
Return the pork chops and any juices to the skillet. Spoon onions over them, top with cheese, and broil for 2 to 3 minutes until the cheese melts and the pork reaches 145°F in the center.
Notes
Model-authored fallback: the source page was inaccessible, so this conventional recipe is based on the unambiguous dish identity in the source URL.