Summary: In a food processor, put leeks onions. Fry in oil & butter. Cool serve with (the cream optional) and chives.
6 leeks. 600-650g diced
Add 2 cubes of vegetable stock
Add 1 liter of boiling water. Add potatoes.
Cover and cook until soft. 30 mins or so
Mix with a hand blender.. Or a free standing one. Add avocado and blend until creamy.
Garnish with chives
And some red peppercorns