Prawns with shallot and chilli jam, herbs and crisp lettuce

1.For shallot and chilli jam, finely process shallot, chilli, garlic and oil in a food processor, transfer to a saucepan and cook over medium-high heat, stirring frequently, until caramelised (40-45 minutes). Add sugar and fish sauce, stir until sugar dissolves, then stir occasionally until jammy (1-3 minutes). Stir in lime juice, remove from heat and transfer to a sterilised container. Cool to room temperature and refrigerate until required. Makes about 1¼ cups. Jam will keep refrigerated for a month.

2.Meanwhile, trim lettuce leaves into cups, place in iced water to crisp (20 minutes), then drain well. Arrange lettuce cups, prawns and herbs on a platter and serve with shallot and chilli jam.