Grate the sweet potatoes very finely and mix with the other ingredients in a bowl. If you like, you can add additional spices (e.g. ginger, chilli, paprika powder, etc.; so the hash browns get a different flavor every time).
Heat the fat in a pan and add about a heaped tablespoon of the mixture to each rösti and smooth it out. Fry each side for about 4-5 minutes over medium heat until crispy. Then degrease on kitchen paper and keep warm in the oven.
I like to top the hash browns with a slice of soft goat cheese after turning them and let it melt slightly 🙂
It goes well with lettuce, smoked salmon, various dips, scrambled eggs, etc.