Rinse the wheat gluten in several changes of cold water, drain, and cut into small dice. Do the same with the mushrooms and set aside.
Heat a wok or large frying pan until hot. Add the oil, garlic, onions, and ginger and stir-fry for 30 seconds. Put in the wheat gluten, mushrooms, and pine nuts. Continue to stir-fry for 1 minute, then add the rest of the ingredients except the cornflour