handful basil leaves with stalks
2 medium–hot green bullet chillies, seeds removed and chopped
large bunch fresh coriander, big stalks removed, some leaves reserved to garnish
2 garlic cloves
1 lemon, very thinly sliced
1 tsp ajwain seeds
1 tsp black peppercorns
salt and freshly ground black pepper
1 tsp caraway seeds
4 cardamom pods, seeds picked
50²µ/1¾´Ç³ú caster sugar
pinch ground ginger, or to taste
1 tsp black mustard seeds
drizzle olive oil, plus extra if needed
pinch salt
splash vegetable oil
knob of butter
4 x 175g/6oz cod fillets, lightly dusted with plain flour