One go to dish for me at any french restaurant is mussels. While Moules-Frites, mussels and fried potatos (aka french fries for most Americans), is the most common item you’ll see on a U.S. menu, it largely originates from France as Moules Marineier. In Belgium they added the fries, and swapped out wine for beer as their own twist to create Moules-Frites.