Preheat oven to 350. Preheat a large frying pan over medium-high heat. Drizzle the cooking oil in the frying pan.
Sprinkle 1 teaspoon of the garlic powder and ½ teaspoon of salt on the pork chops. Rub it in on both sides. Sear the pork chops in the hot frying pan. Transfer to a baking sheet.
Add the peppers and onions to the frying pan. Cook until softened. Add the spinach and cook until wilted. Add the other ½ teaspoon garlic powder and ¼ teaspoon salt. Cool for 5 minutes. In a medium bowl mix the cooked veggies and the shredded cheese.
Cut a slit in the pork chops until you hit the bone. Stuff with the cheese and vegetable mixture. Put in the preheated oven. Cook for 30-35 minutes or until the pork reaches 160 on a meat thermometer.