noun
duck and Welsh onion noodles
A Japanese noodle dish, typically soba or udon, in hot broth topped with duck meat and Welsh onions (similar to scallions).
寒い日には鴨南蛮が食べたくなる。
On a cold day, I crave duck and Welsh onion noodles.
Compound of 鴨 (kamo, 'duck') and 南蛮 (nanban, originally 'southern barbarians', later referring to foreign-influenced ingredients such as chili pepper or Welsh onion). The name likely comes from the use of Welsh onions, which were associated with nanban cuisine.