Place leek and olive oil into TM bowl and chop 3 seconds / speed 7, scrape around bowl
Sauté 5 minutes / Veroma / Speed 1 with MC off
Add cauliflower, water and veggie stock paste (or commercial stock) and cook 15 minutes / 100 / speed 1
Add butter and cook for a further 5 minutes / 100 / speed 1
Add parsley and blend for 1 minute, slowly increasing speed from speed 1 to speed 9 (see safety note above)
Taste and adjust seasoning if necessary
Serve drizzled with the basil and parsley oil, and scatter over the pistachios