1packet Certo**If you like your jelly quite thick use another tablespoon or so of Certo. With the one packet, it makes a nice consistency for spooning on cream cheese, muffins, etc. but it is not super thick.
Combine peppers, vinegar, and sugar in a large pot or dutch oven. Bring to a rolling boil and boil for one minute.
Remove from heat and add Certo and food coloring, if desired. Stir continuously for 1 minute. Skim any foam from surface.
Pour into jars, cover and allow to sit at room temperature for 24 hours, then freeze. If freezing jam makes sure to leave a ½ inch space at the top of the jar to allow for expansion in the freezer.
Alternatively, you can use the water bath method; after adding the Certo and stirring, pour your jam into sterilized jars and proceed as directed here.