Whatever happened to "Patat met in bier gestoofde carbonnades"?
Yours seems a bit up-market for a national dish...
You are Dutchman, aren’t you?
We have more national dishes, some will refer to Brussels sprouts, some to chicory with bacon and cheese sauce, ‘stoofvlees met friet’ is a good candidate as well. (Patat is Dutch, not Flemish)
Probably the most quoted national dish is Mussels with Fries, but I don’t agree, Mussels is Dutch.
It is a regional thing.