Place the broccoli into a heatproof bowl with a pinch of sea salt, then cover with boiling water, leave for 10 minutes, then drain. Peel and finely slice the onion and garlic, and peel and finely chop the ginger. Finely slice the chilli and cut the lime into wedges. Pound the coriander seeds in a pestle and mortar with a pinch of salt and black pepper. Slice the steaks into finger-sized strips, then sprinkle over the spice mixture and toss to coat. Place a wok or large frying pan on a hight heat. Drizzle in 1 teaspoon of olive oil, add the onions, garlic and ginger, then fry for 2 minutes. Drop in the seasoned beef and fry for 2 minutes, then add the broccoli and fry for a further 2 minutes, stirring all the time. Pour in the soy sauce and 1 teaspoon of sesame oil, then toss to coat. Delicious served with egg noodles or steamed rice, and with some fresh chilli scattered on top and a good squeeze of lime juice.