I have one... It might sound a bit weird as I am translating it from my recipe book straight out of the german

but it is yummy!!
250g Cauliflower
1/2 L water
Salt
40g Butter
40g Flour
1 L liquid (made up of the water from cooking cauliflower and milk)
1 Egg yolk
1Tbsp Water
1 pinch nutmeg
Lemon juice
cut cauliflower in to small "branches". Cook Cauliflower in water (1st lot of water - 1/2 L) and salt for 10 minutes and leave to stand in water for an further 10 minutes after turning element off. Pour off water and save.
Heat butter, add flour and stir constantly until light yellow in colour. Add liquid (1L made up of milk and cauliflower water)whilst continuing to stir, bring to the boil and let simmer gently for 5 minutes.
Add egg yolk to the 1 Tbsp of water and add to the soup (which should not be boiling anymore!). Add nutmeg, salt and lemon juice to taste.
Add Cauliflower and let it warm up 5 - 10 minutes in already warm soup.