Stir-fry protein option
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
tofu
(Other definitions for tofu that I've seen before include "Substance used in vegetarian cookery" , "'Soft white food, made of soy milk (4)'" , "Unfermented soya-bean curd" , "Food from bean curd" , "Curdled soybean dish" .)