Bring water to a boil, add cauliflower florets, lower the heat and let it simmer until completely soft (takes around 20 minutes).
When about 5 minutes remain for cauliflower to be done preheat a nonstick pan over medium heat.
Add the rinsed chanterelles and fry until the water has evaporated, stir every now and then.
Add the butter and white pepper, fry until golden brown.
Drain the cauliflower well. Mix using a hand mixer until completely smooth. Add Creme Fraiche, grated parmesan, sea salt, black pepper and stir to combine. Taste to check if more seasoning is needed.
Place the cauliflower purée at the bottom of two plates. Top with fried chanterelles and drizzle with ponzu, roughly chopped hazelnuts and fresh parsley.