Now I've made my gluten free pizza for the first time in Amsterdam. I bought coconut flour from Amanprana at EkoPlaza. Psyllium husk I have previously not found in Amsterdam, but now I happened to go into a Health Club (gym) and they sell everything from protein powder and superfoods to psyllium husk. I topped the pizza with baby spinach and avocado. Yummy! The recipe for the pizza crust is here.