Peel and wash the potatoes and slice them into fine slices. Wash the wild garlic under running water, pat dry with kitchen paper and cut into fine strips. Mix both and salt as needed. Then layer the potato slices like roof tiles in a buttered casserole dish.
Pour the cream and milk into a tall mixing vessel, stir and season with salt, pepper and nutmeg. Add the grated cheese and stir. Pour this cream mixture over the potatoes.
Bake in the hot oven on the middle shelf for approx. 35-40 minutes until golden.