Tianshui Vegetarian Wontons

The word biǎnshí (扁食) is a living fossil of Ming dynasty Chinese: the late-16th-century text Wǎnshǔ Zájì (宛署杂记), compiled by Shěn Bǎng during the Wanli reign, records the New Year custom of making biǎnshí (then written 匾食), and the term was standard across northern China through the early Qing before being superseded by jiǎozi in most dialects. Tianshui, a culturally conservative city in southern Gansu at the junction of the Wei River valley and the Loess Plateau, preserved the Ming-era name intact along with a distinctive trapezoid wrapper found nowhere else. The vegetarian version became especially prominent in Tianshui's Hui Muslim neighbourhoods, where plant-based fillings offered a halal alternative to pork-and-chive.

The wrapper is silkier and more yielding than a dumpling skin—the trapezoid folds create thick pleats that bite with a satisfying chew—then the vegetable filling releases fresh, eggy fragrance and the sharp tomato-vinegar broth cuts through everything cleanly.

The trapezoid wrapper creates graduated thickness at the folds: thin sections reach doneness in about 2 minutes while layered pleats need closer to 3, so the whole biǎnshí arrives uniformly tender on extraction. The wheat gluten network formed during kneading keeps the wrapper elastic through boiling without tearing. The tomato-based broth's citric and malic acids brighten the neutral tofu-chive filling, while polysaccharides released by wood-ear mushrooms lightly thicken the soup and improve its coating of the wrappers.