Potato and Celeriac Gratin

Preparation

1. 1
   Preheat the oven to 375 degrees.
2. 2
   In a large bowl, whisk together the crème fraîche and cream. Add a good pinch of salt and 5-6 grinds black better and whisk once more. Add the remaining ingredients to the bowl and mix well. The easiest way to do this is with your hands. It’s a little messy, but fun!
3. 3
   Layer the well-coated potatoes and celeriac slices in a large gratin dish or individual gratins, slightly overlapping them.
4. 4
   Bake for 35-40 minutes or until the vegetables are tender and the top of the gratin is golden brown. Remove from the oven and let rest for 5 minutes before serving.