PProvenance
Enter
P
Chinese

Stir-Fried Water Spinach with Fermented Tofu (炒通菜 Chao Tong Cai)

Chao tong cai (炒通菜, stir-fried water spinach, also called morning glory or kong xin cai, 空心菜) with fermented tofu is one of the most popular and deceptively simple vegetable preparations in Cantonese cooking. The water spinach's hollow stems retain a pleasant snap while the leaves wilt quickly; the fermented bean curd (doufu ru) provides a rich, creamy, intensely savoury sauce that coats every leaf and stem without being heavy. It is a dish that tests wok temperature management — the water spinach must hit a screaming-hot wok to achieve the flash-wilt that preserves its texture.

‹Swipe for the next dish›
ServesFour portions
Total10 minutes
Sourced1of 6 in BC
Cook
‹ Previous · STIR-FRIED LEAFY GREENS (CHAO QING CAI)|Next · Suan La Fen (酸辣粉) — Sichuan Hot and Sour Glass Noodles ›
I

The Market List

The benchmark for each ingredient, and who stocks it near you. Tap a stockist to go straight to the product.

1.2 kg
water spinach (kong xin cai / morning glory)
whole stalks, washed and drained
Your own market
2
garlic cloves
sliced
Your own market
4–8 tbsp
red fermented bean curd (nan ru) or white fermented bean curd (doufu ru)
mashed to a smooth paste
Not yet stocked in British Columbia
8 tbsp
neutral cooking oil
Not yet stocked in British Columbia
1 tsp
1 tsp
sesame oil
Your own market

Each tap is counted, so the stockist sees the demand Provenance sends them.

II

The Method

1
Set the wok over the highest possible heat and leave it until the surface begins to smoke. This is the prerequisite for everything that follows.
From the canon — The carbon-steel wok is the fundamental tool of Chinese cooking — not merely a frying pan but a cooking instrument whose specific properties (extreme thermal… The Wok: Seasoning, Maintenance, and Heat Management →
2
Add the oil and swirl to coat. Add the sliced garlic and let it sizzle for 10 seconds — it should colour only lightly at the edges.
3
Add all the water spinach at once and toss rapidly at maximum heat. The wok will protest with a violent burst of steam. Continue tossing without pause for 60–90 seconds. This is where the dish lives or dies: if the wok is sufficiently hot, the steam drives off and the spinach wilts to a bright, snapping result; if the wok is under-temperature, the spinach steams in its own water and collapses to a limp, discoloured mass.
4
Push the spinach to the sides of the wok, exposing the centre. Add the mashed fermented bean curd to the centre and let it sizzle for a moment, then toss the spinach back through it until every leaf and stem carries a thin, even coating of the sauce.
5
Add the light soy sauce and sesame oil, toss once more, and transfer immediately to a serving plate. Total elapsed cooking time should not exceed 2 minutes. The stems should yield a clean snap when pressed.
III

Quality Hierarchy

01
Reserve — Red fermented bean curd (nan ru) sourced from a specialist producer, with a minimum six-month cure; water spinach harvested that morning, stems no thicker than a pencil.
02
Estate — Good-quality red or white fermented bean curd from a Chinese grocery, checked for a firm, uncollapsed cube; water spinach purchased the same day, refrigerated stem-down in a little water.
03
Market — Any commercially available doufu ru; water spinach from an Asian supermarket, trimmed of any yellowed leaves and refreshed in cold water before use.
04
House — White fermented bean curd substituted for red where nan ru is unavailable; the flavour is milder but the technique remains identical.
IV

Sensory Tests

◇Sight. The wok surface shimmers and wisps of smoke rise freely before any ingredient is added.
◇Sound. The spinach makes a loud, sustained hiss on contact with the oil — a quiet entry signals insufficient heat.
◇Sight. Leaves are fully wilted and vivid green; stems retain their pale jade colour with no greyness after 60–90 seconds of tossing.
◇Touch. A stem pressed between the fingers yields a clean, audible snap rather than bending limply.
◇Where it lives or dies. The wok must be smoking before the spinach enters; a wok that is even marginally under-temperature will steam rather than flash-wilt the vegetable, producing limpness and grey discolouration that no subsequent step can correct.
Pillar V
Cross-cuisine parallels are part of membership.
The dishes this one teaches you, across the cuisines — on every recipe.
Enter · from $49 a year
VI

What to Pour

A lightly chilled, off-dry Alsatian Pinot Gris or a Shaoxing rice wine served at room temperature; the wine's gentle oxidative character and residual sugar bridge the salt-funk of the fermented curd without overwhelming the vegetable's delicacy.

The whole pairing
Pillar VII
Origin and lineage are part of membership.
Where the dish comes from and how it came to be — on every recipe.
Enter · from $49 a year
Sourced through Provenance

The hands behind the plate.

Purely Artisan Foods
San Diego · light soy sauce
→
← PreviousSTIR-FRIED LEAFY GREENS (CHAO QING CAI)One standard · no exceptions