450 ml (15 fl oz) 2 cups Fresh lemon juice
1 Dried small hot red chilli, crumbled
2 Large onions, thinly sliced into rings
1/2 Garlic clove, chopped
Salt and pepper to taste
3 Large mackerels, filleted and cut into 2 1/2 cm (1 in) pieces
3 Large sweet potatoes, unpeeled
2 Crisp lettuces, separated into leaves and chilled
4 Fresh sweetcorn, outer husks and thread removed and cut crosswise into 5 cm (2 in) rounds
1 Fresh red chilli, split, seeded and cut into thin pieces