I have being preparing these potatoes for years after my father-in-law served them to me on Christmas day. It wasn't for many years later that I discovered the dish originated from Sweden. In Swedish they're called Hasselbackspotatis which translates to Hazelslope Potatoes.
Prep: 10 minutes
Cook: 30 minutes
Prep: 20 minutes
Cook: Cooking Time; 10 minutes
Prep: 30 minutes plus overnight or at least 2 hours
Cook: 10 minutes