
Season 1 ½-2 pounds thick-cut pork chops on both sides with ¾ teaspoon salt and ½ teaspoon ground black pepper.
Heat a large 14-inch skillet over medium-high heat, then add 1 tablespoon vegetable oil and the pork chops. Cook for 3 minutes, then flip and cook for an additional 3 minutes. Remove the pork chops to a plate and set aside.
Whisk 1 ½ cups pineapple juice, ¾ cup packed brown sugar, ½ cup low-sodium soy sauce, 4 teaspoons cornstarch, and 2 teaspoons minced garlic together in a medium bowl.
Add the sauce to the skillet and bring to a simmer over medium heat. Cook for 5 minutes, until it begins to thicken.
Add the pork chops back to the skillet, then nestle 1 (15-ounce) can pineapple slices, 1 cup chopped red bell pepper, 1 cup chopped green bell pepper, and ½ cup chopped red onion around the pork chops. Cook over medium heat for 10-12 minutes, until the internal temperature of the pork chops reaches 145 degrees Fahrenheit and the sauce becomes thick enough to coat them.