Peel and cube potatoes, boil in salted water for 10 minutes until fork-tender, then drain and mash with 2 tablespoons butter, milk, salt, and pepper.
While potatoes cook, slice apples and onion, then heat 1 tablespoon butter in a large skillet over medium heat and sauté apples and onions for 4 minutes until softened; transfer to a plate.
Add remaining butter to the skillet, season pork chops with salt and pepper, sear 4 minutes per side until golden and cooked through, then top with apple-onion mixture.
Divide pork chops, apple mixture, and mashed potatoes among four plates and serve.
Photo: To Uyen / Unsplash