Add 1 tablespoon of the butter to the skillet and when it melts, whisk in the flour. Cook for 1 minute, stirring, then whisk in the cider and stock. Season the gravy with salt and pepper. Cook over medium-low heat for 3 to 4 minutes to thicken.
03Serve the chop covered with apples and onions, the gravy poured down over the top, and the muffin alongside.