- Step 1
Freeze steak for 15 minutes (this will make it easier to slice thinly), then cut into thin strips. Using a rolling pin, flatten each strip to 2mm thick.
- Step 2
Combine onion, garlic, soy, sesame oil, ginger and sugar in a bowl. Add beef, turn to coat, then marinate in pan in the fridge for 1 hour.
- Step 3
Preheat barbecue or chargrill to high. Cook beef, in batches if necessary, for 10 seconds each side until just cooked.
- Step 4
Divide rice among lettuce cups, top with slices of beef and scatter with spring onion and chilli. Drizzle over beef cooking juices to serve.