Chengdu, Sichuan — influenced by Guizhou's suantang tradition; now a popular Chengdu restaurant dish for those who want Sichuan flavour without the full ma la intensity
Suan tang yu: Sichuan-influenced sour fish soup — a lighter, more elegant alternative to the fiery shui zhu yu. A whole fish or fish fillet poached in a sour-broth made from Pixian doubanjiang, tomato, pickled mustard, and fish stock. The sourness comes from the pickled vegetables and tomato — the heat from chili is secondary. A Chengdu restaurant classic that bridges Sichuan and Guizhou influences.
Bright sour, lightly spiced, clean fish — a refreshing Sichuan preparation that shows the cuisine's range beyond heat
{"Sour broth base: tomato + suan cai (sour pickled vegetables) + light doubanjiang","Fish added to cold broth and heated together — preserves delicate texture","The broth should be assertively sour but only mildly spicy — the sourness is the star","Finish with chili oil and Sichuan pepper oil for the Sichuan character"}
{"Snakehead fish (li yu) or grass carp work well — firm flesh that holds up in the broth","The suan cai provides both sourness and salinity — season cautiously with additional salt","Some versions add thin glass noodles to the broth in the last 2 minutes — they absorb the sour broth beautifully"}
{"Over-spicing — making it a fiery fish dish loses the sour character that defines the recipe","Hot-starting with the fish — the sudden heat toughens the flesh","Insufficient sourness — without adequate acid from pickled vegetables and tomato, the dish is generic"}
The Food of Sichuan — Fuchsia Dunlop