Mix the onion, garlic, ginger, chilli, lime juice and soy sauce in a medium sized, non-reactive container. Add the tofu and gently stir to cover with the marinade; don’t be too vigorous or you’ll break it up. (Ideally, if you have time, you can marinate the tofu for an hour before cooking or ideally overnight but this is not essential.)
Take the tofu out of the marinade. Drain off the liquid and reserve.
Heat the oil in a wok over a high heat. Add the onion, garlic, chilli, and ginger from the marinade to the pan and stir-fry for a couple of minutes. Add the Tenderstem broccoli and continue to cook for a couple of minutes more. Tip in the nuts and fry until they are patched with brown.
Now add the tofu and very gently stir it in. Pour in the liquid from the marinade along with 200ml (7fl oz) water. Reduce the heat, cover and cook gently for 2 minutes or until everything is heated through.
Serve with plain rice.