Preheat oven to 375F degrees. Then, preheat a large skillet over high heat. Pour in oil.
Season both sides of pork chops with salt, freshly ground black pepper and garlic powder.
Once skillet is nice and hot, add in pork chops and brown pork chops on both sides in hot oil. You will need to do this in batches. Be sure not to cook pork chops all the way through, they will finish cooking in the oven.
Be sure not to cook pork chops all the way through, they will finish cooking in the oven.
Note: you may need to add more oil to the pan while browning the pork chops. Set aside browned pork chops while making hash brown mixture.
In a large bowl, combine sour cream, soup and milk.
Stir in hash browns and onion.
Spread hash brown mixture into an ungreased 9x13-inch baking dish and sprinkle with cheese.
Top with pork chops.
Bake uncovered for 45-50 minutes or until heated through and pork chops are fully cooked. If casserole is getting too brown while cooking, cover with alumiunm foil.