Heat a wok, add a little vegetable oil and quickly stir-fry the aubergines until tender, then remove with a slotted spoon and drain on kitchen paper. Discard the oil and wipe out the wok.
Heat some more oil in the wok, add the mushrooms and stir-fry for about 30 seconds, then add the chopped chilli and stir-fry for another 30 seconds.