Cut around the tops and twist and the top and seeds should pop right off. Cut peppers in 1/2. Remove any remaining seeds. Cut peppers into whatever size strips or chunks you like. Freeze peppers in a single layer on a cookie sheet until frozen. Sometimes I just toss into the bag and break off however many I want to use. They seem to break apart easily, however individually freezing them first will allow you to just pour some out easily.
Put peppers into freezer bags and press out any air. Seal and freeze.