I honestly have no clue. I mean I know we eat rice, but wouldn't say we eat a lot of it. And while we do have a large immigrant percentage, not a significant amount of those are from regions where eating rice is popular.
In Belgium, about 2.0% (220000) have Turkish citizenship or (partial) ethnicity/ancestors, whereas in Germany, it's 4.2% (3.5-4mio people). That can't be it.
But afaik the nehterlands have a „large“ malaysian population and a couple if „classic“ snacks are variation of east asian dishes (bamischijf, peanut sauce on fries)