Do you know what they call it in the Netherlands? My wife is Dutch and we've been to the Netherlands a bunch of times and I'm trying to picture what it is you're eating. Most of the bread we ate there, or that my wife's family eats is a pretty unassuming white bread (a grocery store italian loaf wouldn't be a bad comparison) just buttered, usually with a slice of gouda or ham.
Oddly the rest of the US has sourdough but none of them have ever heard of Dutch Crunch. Which is just as well because it really cuts up your mouth.