Three-Color Vegetable Stir-Fry (Potato, Carrot, Red Pepper with Celery)

Why people make this dish

Potato, known in Hong Kong as “shu zai” and in northern China as “tu dou” or “ma ling shu,” is one of those vegetables that quietly punches well above its weight nutritionally. It contains about ten times the vitamin C of an apple, four times the B vitamins, and several times the minerals — and yet it is gentle enough for people with sensitive digestion. “Qing chao tu dou si” (clear-stir-fried potato shreds) is a classic Beijing home-style dish, and adding a splash of vinegar during cooking is a well-known technique that not only brightens the flavour but is thought to enhance the absorption of protein, calcium, and vitamin C from the dish. Bro Niu combines potato with carrot, red pepper, and fresh celery for a colourful everyday stir-fry that is as nutritious as it is easy to prepare.

Who it suits / who should be cautious

• Suits most people, including those with a weak spleen and stomach, poor digestion, or abdominal bloating and discomfort
• Traditionally considered helpful for those with irregular bowel movements
• Avoid using green-skinned potatoes or any potatoes that have sprouted — these contain solanine, a naturally occurring toxin that can cause illness (see tips)
• Suitable for vegetarians

Why these ingredients (the food-therapy logic)

• Potato (tu dou): In Chinese food-therapy, the potato is associated with nourishing the spleen and stomach, easing digestive tension, and promoting comfortable bowel function. Modern nutrition confirms its impressive vitamin and mineral density
• Carrot (hong luo bo): Rich in beta-carotene; traditionally supports the spleen and liver, and adds natural sweetness and colour
• Red bell pepper (hong jiao): Adds vitamin C and antioxidants; brightens both the dish and the digestion
• Celery (qin cai): Fragrant and lightly aromatic; traditionally supports the stomach and helps settle digestive restlessness
• Rice vinegar: A small splash during high-heat cooking is a classic technique for preserving the crisp texture of potato shreds and is said to improve mineral and vitamin absorption

Ingredients (2–3 servings)

Ingredient	Amount	Notes
Potato	2 medium	Peel and julienne into thin shreds; soak briefly in cold water to remove excess starch
Carrot	1 small section	Peel and julienne
Red bell pepper	1/2	Wash and julienne
Celery, finely chopped	1 tablespoon	Fresh; can substitute with spring onion
Cooking oil	a small amount	Any neutral oil works
Salt, light soy sauce, rice vinegar	to taste	Add seasoning only at the end

Method

1. Peel the potatoes and carrot, then cut into thin julienne strips. Soak the potato shreds in cold water for a few minutes to draw out excess starch, then drain well.
2. Wash the red pepper and cut into thin strips.
3. Heat a wok or heavy pan over high heat. Add a small amount of oil and let it heat up.
4. Add all vegetables to the hot wok. Stir-fry quickly over high heat. Sprinkle a little water into the pan during cooking to prevent sticking and to create a little steam.
5. Stir-fry until the juices have mostly evaporated and the shreds are just cooked through but still have a pleasant bite.
6. Add seasoning (salt, a splash of light soy sauce, a small dash of rice vinegar) and toss to combine for a few seconds. Serve immediately.

Bro Niu’s tips

The key technique here is high heat and speed — do not add the salt or soy sauce too early, as this will draw out moisture and make the vegetables go limp. A splash of vinegar not only lifts the flavour; northern Chinese cooks have always known that it keeps the potato shreds crisp and is thought to help the body absorb more of the vitamins and minerals in the dish.

One important safety note: green-coloured potato skin and any sprouted potatoes contain solanine, a naturally occurring toxin. Never eat these. If anyone accidentally eats a small amount and experiences tingling lips, nausea, or stomach discomfort, Bro Niu suggests preparing an emergency remedy: simmer 75 g (2 liang) of mung beans with 7.5 g (2 qian) of liquorice root (gan cao) in water and drink frequently until symptoms pass. For any serious or persistent symptoms, seek medical attention immediately.

Community questions answered (selected)

• Q (May May): Can eating sprouted potato actually be fatal? Bro Niu: If someone eats a large enough quantity and the solanine poisoning goes untreated, it can be very serious. In practice, most people would not eat enough to reach that level — but it is genuinely dangerous, so always cut out any green or sprouted sections completely before cooking.

• Q (reader): I have thyroid nodules and feel very cold all the time. I am not sure what to eat or avoid. Bro Niu: For thyroid nodules with coldness, kelp, seaweed, and hijiki are helpful choices. Soybeans, cabbage, and white radish can interfere with thyroid function, so those with low thyroid function should eat them less often. To address the persistent feeling of cold, a warming herbal soup of bei qi (astragalus), fang feng, bai zhu, and gui zhi with ginger and red dates, cooked two to three times a week, may help build constitution and reduce cold sensitivity.

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Published April 28, 2016 · Adapted and translated for Nourilo from a traditional home-kitchen recipe. Approx. 4 min read.