1 medium-hot red chilli, finely chopped
few sprigs fresh coriander, to garnish
2.5cm/1in piece fresh root ginger, peeled and grated, or finely diced
1 lime, juice only
2 spring onions, thinly sliced
1 tbsp clear honey
2 tbsp sesame oil
2 tbsp sesame seeds, toasted
6 tbsp light soy sauce
480g/1lb 1oz tuna loin (preferably yellow fin, as fresh as possible)
4 slices ciabatta