Potato Gratin ~ vegan

It's getting cold and everyone in France seems to be getting into their baked cheese dishes in a big way. Well I love comfort food too so had a go making my own potato gratin (flavoursome potatoes are key).
Ingredients listed by quanity, but not exact quantities, are as follows :
Good waxy potatoes
Cashew cream (or other thick cream may work)
Nutritional yeast
White Miso
Dried shallots
Sea salt
Garlic powder
Cumin powder
Turmeric powder
Drizzled with olive oil and scattered with walnuts.
There were no leftovers; I scoffed the lot!