Add the cooking oil and bacon grease to a cast iron skillet and heat over medium. You'll want the skillet hot before adding the pork chops.
Score the top of the pork chops, season both sides with one teaspoon of the Creole seasoning, set aside.
Next, add the flour to a bowl and season with remaining two teaspoons of Creole seasoning and onion powder; combine.
Dredge each pork chop in the seasoned flour and place into the hot skillet; brown on each side (about 5 minutes per side).
Remove the pork chops and set aside.
Next, add the bell pepper, onion, celery and hot pepper to the skillet and sweat until slightly tender, about 5 minutes.
Next, add the garlic, diced tomatoes and Worcestershire sauce to the vegetable mix. Stir to combine.
Bring to a simmer; return the pork chops to the skillet with the vegetables until heated through.
Add slurry mixture, if using, to thicken the juices.
Serve over cooked rice.