Sweet potato, turnip and wild mushroom gratin

1. Step: Select “ Potato Gratin” program on the Combi and start preheat.
2. Step: Whisk together the cream, cinnamon, nutmeg, salt and pepper until smooth.
3. Step: In a 2-inch half size hotel pan, arrange an even layer of sweet potatoes and turnips. 
             Drizzle with a ¼ cup of the cream, sprinkle with ½ cup of roasted mushrooms.
             Repeat process to make 8 to 10 layers. Press down on the layers to totally submerge the sweet potatoes and turnips in the cream mixture. 
             Sprinkle Parmesan evenly on top layer.
4. Step: Bake Gratin in the Combi, at program end remove the Gratin and let it rest for at least 10 minutes before serving.