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No the cabbage is a traditional thing in many danish dishes, like frikadeller (köttbullar). On hotdogs is better than it sounds :-)
Absolutely. Acidity is a very overlooked "spice" in most peoples cooking. I use any opportunity to get it acidicized :-)... In a cook book from a famous danish beach resort hotel, it says " lemon is what destroys the food, if not added " :-)