LOL - it's not just in The Neatherlands ... assuming this Shawarma
is what you are talking about.
Assuming you're looking for the hot sauces - here are some recipes for Zhug
and one for Schug
- sorry, I couldn't find a recipe for Schug Chum
(made with tomatoes instead of peppers) but I would imagine you would just make it the same and use tomatoes in place of the peppers.
Hope this info get's you started.