Preheat the oven to 375 degrees F (190 degrees C).
Melt butter in a large skillet over medium heat; cook and stir apple and onion in melted butter until tender
about 5 minutes. Transfer apple and onion mixture to a bowl.
Place pork chops in the same skillet over medium heat; cook until pork chops are browned
about 5 minutes per side. Place pork chops in a 9x9-inch baking dish; season with salt and black pepper.
Mix applesauce
brown sugar
mustard
and cinnamon into apple and onion mixture. Spoon over pork chops.
Bake
covered
in the preheated oven until pork chops are no longer pink in the center
30 to 45 minutes. An instant-read thermometer inserted into the center should read at least 145 degrees F (63 degrees C).
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