Is Gai Lan harder to chew, simply because it's wider, than Choy Sum?
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Many Chinese restaurant servers counsel that Choy Sum (菜心) is easier on the teeth and to chew, because it's thinner than Gai Lan (芥蘭). Is this scientifically true?
Pictures
Girthier Gai Lan. Top, Middle, Bottom.



Slimmer Choy Sum. Top, 2nd from top, Second last, Bottom.





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