Pre-heat the oven to 200degreesC/gas 6. Put the potato slices in a colander and rinse under running water to get rid of the starch. Place on a cloth in a single layer and pat dry. Generously grease the base of an ovenproof pan or baking dish with melted butter. Arrange the potato slices in the pan in overlapping circles , brushing butter over each layer and seasoning as you go. Cover with greaseproof paper or a lid. Bake in the oven for 45minutes or up to 1 hour. Test with a skewer to see if the potatoes are done. Cooks Notes:. Cook this in a cast-iron, heavy-bottomed, stubby-handled frying pan that goes in the oven. Traditionally it should be lidded - mine isn't, so I use greaseproof paper. Historical Note:. Mrs. Landemare's original recipe is:. Potatoes. Fresh butter. Peel some potatoes and cut into very thin rounds the size of a florin. Wash in salted water and dry very well in a cloth. Well butter an omelette pan. Place a layer of potatoes on the bottom. Cover with oiled [melted] butter, pepper and salt. Repeat these layers until the pan is full and cook in a medium [350degreesF] over until brown [40-60 min.] Remove from the oven, turn out and cut into slices or serve whole in a dish.