Rockpool's Cream Cauliflower Soup with Parmesan

peeled fresh garlic cloves

peeled brown onion, halved

olive oil

unsalted butter

sea salt

Freshly ground white pepper,

cauliflower florets, roughly chopped

fresh chicken stock (I used vegetable stock but 900g of water with 2 tbsp TMX stock is fine too)

single (pouring) cream

Dijon mustard, approximately

parmesan cheese, finely grated (approximately)