Scrub potatoes, and remove all eyes, rough spots. Slice into thick slices.
Boil slices in water until just tender – maybe 8 minutes.
Heat butter to sizzling in heavy skillet or caste iron pan.
Place potatoes in skillet and allow to brown, both sides.
When all are browned, toss in large casserole with seasonings.
Bake at 350°F for 10-15 minutes