Season both sides of the pork chops with salt and pepper.
Heat the oil in a large skillet over MEDIUM heat. Add the pork chops and cook 3 to 4 minutes per side, until browned. Transfer the chops to a plate and set aside.
Add a little additional oil to the skillet, if needed and return it to MEDIUM heat. Add the red bell pepper and onion to the skillet. Cook, stirring, until the onions are golden and the peppers just beginning to soften (they'll simmer in the sauce later), about 3 minutes. Add the garlic and cook for about 30 seconds, until fragrant.
Add the chicken broth, pineapple tidbits with their juice, soy sauce, brown sugar, ketchup, ginger, and apple cider vinegar and stir to combine. Bring the mixture to a gentle boil.
Return the pork chops and any accumulated juices to the skillet. Increase the heat as needed to bring the sauce to a boil, then reduce the heat to MEDIUM-LOW, cover, and simmer (at a low boil) for 8 to 12 minutes, or until the pork reaches an internal temperature of 145 °F. Total time will vary depending on the thickness of your chops. Remove the skillet from the heat and transfer the pork chops to a plate and set aside.
In a small bowl, whisk together the cornstarch and cold water. Stir the slurry into the skillet. Bring to a simmer over LOW heat and cook, stirring, for 1 to 2 minutes, until the sauce thickens and becomes glossy. Remove from the heat.
Nestle the pork chops down into the sauce and spoon some of the sauce over the top. Garnish with green onions, if using.
Serve over hot cooked rice with plenty of the pineapple sauce spooned over the top.