Rewatching the episode, and Mei says
“duck fat roasted cabbage with a trout vinigrette…I would typically use anchovy in this type of vinigrette to make it really salty but I used trout instead”…other comments “the vinigrette, …subtle and lovely” “the vinegar really pops”…“crunch, juiciness, sweetness from the cranberries”. “the cabbage took on such al oveley texture…crunchy,smokey, …pure comfort food.”
