That is what I do. Blacken them on the grill, cool, put
Into zip lock bags in groups of 3 to 5 depending on their size this year. Then I put several of those bags into the gallon size zip lock and freeze. I do ten pounds every august.When cool, I gently try to pull the top stem off and usually the seeds come out too. Sometimes, they won't let loose and that is no big deal. When slightly defrosted, remove the charred skins and pull off the tops and seeds.