- Bring juice, vinegar and peppers to a boil in a large pot. Simmer for 10 minutes. Remove and discard pepper pulp. If you desire a very clear jelly you can strain, or pour through a cheesecloth. 
- Measure 2 cups of liquid and return to pot. 
- Bring to a hard boil, and add sugar all at once. Stir to dissolve, and then add the liquid pectin. 
- Boil hard for 1 minute. 
- Pour into jelly jars, leaving 1/4 inch of headspace. 
- Add 1 small whole red chili pepper (optional) 
- Wipe rims and seal with lid and ring. 
- Process in water bath for 5 minutes.