01 - Pat the pork chops dry with paper towels and season generously on both sides with salt and freshly ground black pepper.
02 - Heat the olive oil and unsalted butter in a large skillet or Dutch oven over medium-high heat. Once shimmering, sear the seasoned pork chops for 2 to 3 minutes per side, until a deep golden-brown crust forms. Remove the chops from the pan and set aside on a plate.
03 - Reduce the heat to medium. Add the thinly sliced yellow onion to the same pan and cook for 3 minutes until softened and translucent. Add the minced garlic and cook for an additional minute until fragrant, being careful not to burn.
04 - Stir in the sliced apples, fresh thyme sprigs, and fresh rosemary sprigs. Cook for 2 minutes, stirring occasionally, allowing the apples to soften slightly.
05 - Pour in the apple cider and chicken broth, using a wooden spoon to scrape up any browned bits (fond) from the bottom of the pan. Stir in the Dijon mustard and optional cinnamon. This process enhances the depth of flavor.
06 - Return the seared pork chops and any accumulated juices to the pan, nestling them into the apple and onion mixture. Bring the liquid to a gentle simmer. Cover the pan tightly, reduce the heat to low, and braise for 25 to 30 minutes, or until the pork is tender and cooked through to an internal temperature of 145°F (63°C).
07 - If a thicker sauce is desired, carefully remove the pork chops and apples to a serving platter. In a small bowl, whisk together the cornstarch and 1 tablespoon of water to form a slurry. Pour the slurry into the simmering liquid in the pan and continue to simmer for 2 to 3 minutes, stirring constantly, until the sauce has thickened.
08 - Serve the braised pork chops immediately, spooning the apple cider sauce, tender apples, and onions over the top.