Chop the vegetables and fry them in a little oil. Finely grind the cashew nuts in a blender (or soak beforehand and puree with the hand blender and some water), mix with approx. 3/4 l water. Pour the resulting cashew cream over the vegetables.
Add the spices and simmer for about 10 minutes until the potatoes are cooked. Season to taste if you like (e.g. with a little mustard, for an even more cheesy taste), possibly add water.