01 -
Set the oven temperature to 190°C to prepare for baking.
02 -
Boil the peeled and sliced sweet potatoes in a large pot until tender, approximately 10 to 15 minutes. Drain thoroughly.
03 -
Grease a baking dish and arrange half of the sweet potato slices evenly on the bottom.
04 -
Distribute half of the fresh cranberries over the sweet potato layer.
05 -
In a bowl, combine heavy cream, brown sugar, ground cinnamon, salt, and black pepper. Mix until homogeneous.
06 -
Drizzle half of the cream mixture over the layered sweet potatoes and cranberries.
07 -
Repeat layering with the remaining sweet potatoes, fresh cranberries, and pour over the rest of the cream mixture evenly.
08 -
Sprinkle shredded Gruyère cheese and breadcrumbs evenly over the top layer.
09 -
Place the assembled dish in the preheated oven and bake for 30 to 35 minutes until the top is golden brown and bubbly.
10 -
Allow the gratin to cool for a few minutes before serving to settle the flavors.