Step 1

Slice the beef fillet in half lengthways. Heat the oil in a large frying pan over a high heat; sear beef on all sides, cooking it for 10 minutes. Remove from pan, cover and rest for 10 minutes.

Step 2

Meanwhile, combine the lime juice, fish sauce and sugar in a large bowl; stir until the sugar dissolves. Add the garlic, lemongrass and chilli. Slice the beef thinly; add to the marinade. Cover, refrigerate for 2 hours.

Step 3

Using a vegetable peeler, slice thin ribbons of the carrot into a large bowl. Add the onion, cucumber and fresh herbs; toss to combine. Arrange the salad on a serving platter and top with the marinated beef, peanuts and shallots.