Why are my stir fried pea sprouts too stiff, and turn into lumps?

Question

I'm trying to make stir-fried pea sprouts as seen this photo), but without the mushrooms.

I used this kind of pea sprouts:

First I wash and soak them in salt water for 15 mins. I know that I mustn't overcook these pea shoots. 2nd I turn my stainless steel pan to high heat. 3rd I add oil and Shaoxing wine. 4th I add the pea shoots to the pan, and stir fry for under 30 seconds.
But they're too stiff/starchy to even chew. When I chew them, they turn into lumps that I can't swallow.
Is the kind of sprouts the problem? Are another kind of sprouts sold in Hong Kong?

FuzzyChef · Accepted Answer

I don't make the Hong Kong recipe, but I often cook Thai-style pea shoots in the spring.  And for that matter I often made them when I lived in California, so origin is not your problem.
One thing I did find is that there's a huge difference in pea shoots based on age. Tiny, 3-day old pea shoots, also called "pea sprouts", are the kind you want to flash-fry:

Pea shoots that are a bit older, like a week or two old are also eaten:

However, these are a lot more fibrous, and need to be blanched before frying.  I don't know what you bought, but it really sounds like you got older pea shoots.  Species might also make a difference; the ones that Asian markets sell are usually snow pea shoots.  If you got some other kind of pea shoot, like English peas, it's possible that those are also more fibrous.

bob1 · Answer

The problem might well be that you have too much salt present in the mix. Pulses need salting after cooking - if you ever cook chickpeas (channa dal), lentils (e.g. toordal) or similar items, you need to cook until soft before adding any salt otherwise they become inedible hard lumps.
Try just rinsing the pea shoots in water before cooking, salting to taste (usually in Chinese cookery with soy-sauce or oyster sauce) in the final seconds of your process.

GdD · Answer

If they are too hard you likely aren't cooking them long enough. 30 seconds is a very short space of time, there are very few things which will cook that quickly. There are two approaches I would try:

Stir fry it longer. It may take a minute, two or longer to get to the consistency you want. Try it as you cook it, you'll get an idea of what cooked looks like
Stir fry then steam it. Stir fry it for your 30 seconds to give it a bit of color, then add a small amount of water (I'd add a bit of some sort of sauce, or soy, or a bit of stock of some kind but it depends what you want it to taste like), then cover it.

Why are my stir fried pea sprouts too stiff, and turn into lumps?

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