Step 1

Place the capsicums, tomatoes and chillies in the bowl of a food processor. Process until finely chopped.

Step 2

Transfer the chilli mixture to a large saucepan. Add vinegar and bring to the boil over high heat. Reduce heat to low and simmer, uncovered, for 5 minutes. Remove pan from heat. Add sugar and jam setting powder. Use a wooden spoon to stir until sugar dissolves.

Step 3

Return pan to high heat and bring mixture to the boil. Boil, uncovered, for 5 minutes. Ladle into hot sterilised jars (see note), seal and turn upside down for 2 minutes. Invert and allow to cool.