Peel the potatoes, either keep the skin on or peel. Wash and either using a mandolin or sharp knife, slice into thin slices. Pour a drizzle of oil into an ovenproof frypan, on medium-high heat add the potatoes and fry gently.
Let it flavour for a few minutes then add the milk and cream. Continue adding the thyme and nutmeg then season to taste with salt and pepper. Cover and cook for 10 minutes.
Preheat oven to 200C. Put the pan into the oven and cook for another 15 minutes.
When cooked, remove from the oven, let cool for a few moments and serve.