Pare potatoes and slice thin; coat pork chops with small amount of flour and brown on both sides in oil in a large skillet.
In a medium saucepan, melt butter; add flour, salt and pepper, and minced onion. Mix with melted butter till thickened. Slowly add the milk, stirring constantly. Keep stirring until it starts to thicken.
Place potatoes in Dutch oven or large baking dish. Pour half of white sauce over them. Place pork chops on top. Cover with remaining white sauce.
Bake, covered, in a 350-degree oven for 1 hour. Remove lid and bake another 30 minutes.
You may also add 4 to 8 ounces of cheddar cheese to the white sauce while it is hot.