Braised Pork Intestine with Golden Clover

草头圈子 is a classic of old Shanghai's 本帮 restaurant kitchens, the offal cookery of the 浓油赤酱 school; like much 本帮 food it began as cheap, hearty fare for laborers and was refined into a restaurant dish. It is associated with the city's long-established houses — sources variously credit 老正兴 (founded 1862) and the slightly later 德兴馆 (1878), both nineteenth-century houses — but the accounts conflict and no single inventor or date can be confirmed. The dish has two parts named plainly: 圈子 for the rings the sliced large intestine forms (the rectum, boiled until it curls into a soft round tube, then cut into rings), and 草头 for the golden clover beneath it. The clover (南苜蓿, also called 金花菜) is a Jiangnan spring green; an old Shanghai saying about a properly braised 圈子 has it that a piece thrown at the wall would stick.

A good 圈子 ring is tender and yielding with a slight resilient chew, the wall thick enough to hold its shape but soft enough that the rings almost melt; the braise is glossy mahogany, sweet-savory and deeply meaty, with no trace of barnyard smell — the whole test of the dish is whether the intestine was cleaned and cooked clean. Underneath, the golden clover stays bright green, crisp-tender and faintly grassy-sweet, sharpened by the heady note of the white liquor it was fired with. You eat them together: a rich, sticky-lipped ring of intestine, then a forkful of the cool clean greens that have drunk the dark sauce. Done badly the intestine is rubbery, greasy, or still smells off, or the clover is wilted and sodden instead of crisp.

Two techniques, opposite in tempo. The intestine is collagen-rich and starts tough; cleaning is the first half of the work — it is turned inside out and repeatedly rubbed with salt, flour or vinegar and rinsed to strip the slime and odor — and then it needs a long, low red-braise (红烧) in soy, sugar, wine and aromatics so the collagen slowly converts to gelatin and the rings turn tender and silky while the sauce reduces to a glossy, sticky 浓油赤酱 glaze; the sugar both rounds the flavor and helps the sauce cling. The clover is the reverse: it bruises and weeps water fast, so it must hit a screaming-hot wok for seconds only, and the splash of high-proof 白酒 flashes off in the heat, its alcohol carrying and lifting aromatic compounds (and masking any lingering offal note) while the brief, fierce cooking keeps the leaves green and crisp. Plated together, the lean, water-rich greens balance the fat-rich intestine.