I forgot WI Fish Boils on Fridays. https://www.foodnetwork.com/recipes/fish-boil-recipe-1938074
That's where they fry the bait rather than go fishing ;-)
Someone already mentioned southern Maryland stuffed ham. Often accompanied by 'Uarsters' (fried oysters).
'Kuchen' in central ND. It's a type of pie the germans from russia who settled that area brought along.