If you ask the chinese tourist, they will say traditional danish food is the "open faced sandwich" or smørrebrød, as we call it. .
It is very dark, ry bread, with some version of meat or fish, and a bit of green on it.
However, I would say Denmark over the last 10 years, has reinvented our traditional kitchen, with the "New Nordic". An insane respect for the ingredients, and for the taste experience. We have Michellin chefs doing street food, new places pop up everywhere, with new takes on how to make everything from a burger, to steaks, to fish, to… everything. I had a talk with an american while waiting in line for a pizza a month or so back, where she said, she has never tasted food as she does when she is in Copenhagen.
In case you are curious, New Nordic versions of the Open Faced Sandwich look alot more like this now.