DICE THE PEPPERS: Finely dice the peppers and chilli. It is better to use a food processor, as this helps to release the juices, but you can do this by hand if you like. Grate the apple, then put the peppers and the apple into a large, heavy-based saucepan.

ADD SUGAR AND VINEGAR: Stir through the sugar and vinegar, then heat gently, stirring until the sugar has dissolved. Bring the mixture to a rolling simmer, then simmer for 20 minutes until the mixture has reduced and begun to thicken.

PREPARE YOUR JARS: Meanwhile, heat the oven to 120°C / 250°F / Gas ½ and wash your jars in warm soapy water. Place the jars in a baking dish in the oven to sterilise. Place the lids in a heatproof bowl and pour over boiling water.

JAR AND COOL: After the jelly has reduced, allow to cool for 5 minutes before transferring to a heatproof jug. Pour into the hot, sterilised jars. If you find the pieces of pepper are floating to the top of the jar, invert the jars every 10 minutes until set.

SETTING TIME: The jelly will be still quite liquid while hot. Allow to set and gel overnight. Store in a cool dry place and don’t forget to label the jars.