pinch dried red chilli flakes
陆 cucumber, halved lengthways and thinly sliced
陆 lime, juice only
1 tbsp roughly chopped fresh mint
6 radishes, roughly chopped
陆 tsp garam masala
salt
1 tbsp butter, softened
2 tbsp Greek-style plain yoghurt
2 x 100g/3陆oz smoked mackerel fillets