Dice the red peppers into small pieces

Add the red peppers, sugar, salt, lemon juice and vinegar into a large saucepan on medium heat.

Bring to a boil and then let it simmer for 15 minutes. If making a hot pepper jelly, add the chili flakes in the last 5 minutes.

Add pectin to the saucepan and let it boil for another minute.

Let the mixture cool and then pour into jars and let the jelly set. Refrigerate for up to 1 year