What is Dutch food anyway? Bitterballen? Just some salted fish on a thin slice of rye? Seems like everyone there in your neck of the woods eats Italian basically? I spent a solid month in Amsterdam once and the most "Dutch" thing I ate was....Indonesian?
Dutch and Amsterdam restaurants are not a good place to look for Dutch cuisine, although I remember the stamppot restaurant fondly. I'm afraid you'll have to get into non-urbanite homes to get a real taste, in the south of the country if you can, or accept a level of fusion which some higher-end restaurants offer, but is generally hard to trace, even for a Dutch person.
> Makes me wonder what we ate before potatoes were introduced to Europe, I have no idea really.
There is a very interesting book [1] on this subject, and it's title is slightly misleading: the cuisine of the Netherlands of course means you're going to be talking about European cuisine in general, and the effects of trade routes opening up (middle and central Asia first, north Africa, later east Asia and the Americas).
Highly recommended if Dutch/European history of cuisine interests you.
