Step 1

Whisk together the fish sauce, chilli sauce, lime juice and sugar. Place the steaks in a large plastic food bag and add most of the marinade, reserving 1½ tablespoons to dress the salad. Seal the bag and leave the steaks to marinate in the fridge for at least an hour, or preferably overnight.

Step 2

To make the salad, mix all the ingredients together with the reserved dressing.

Step 3

Bake the ciabatta rolls according to the packet instructions, or, if using fresh, gently warm in a low oven.

Step 4

Meanwhile, heat a large griddle pan over a very high heat. Cook the steaks for a few minutes on each side, until cooked to your liking. Set aside to rest for 5 minutes.

Step 5

Halve the ciabatta rolls and spread generously with mayonnaise.

Step 6

Trim any excess fat off the steaks and slice thinly. Divide between the four rolls, top with the salad, and serve immediately.