Cabbage in garlic sauce at Jo Jo Taipei
This gets my nomination for dish of the year. It's 1" pieces of crunchy green cabbage in a sweet, sour, and spicy oil that tastes oddly like Cool Ranch Doritos. Bits of thinly sliced garlic, scallions, and Thai chilies create a truly harmonious flavor.
Regarding other dishes:
Tea smoked duck is succulent and smoky. It's better than most but not as good as Fuloon's, which is more tender (and you can eat most of the bones in that version).
Salted crispy chicken is served on the bone, and a bit spicy, but not salty enough. MuLan is still the winner here.
Eggplant with basil is decent, but still has nothing on the Taiwan Cafe version.
The bitter melon with spicy sauce is thin slices of crunchy bitter melon doused in a mustard sauce (or, rather, a mixture of mustard powder and water). The wasabi-like flavor shoots directly up your nose as you eat the melon, masking some of the bitter flavor in an unexpected way.