Scrape off the skin, remove the top and the seeds and chop (it's fine to have a few charred bits in there)
Sautee corn (fresh or frozen), scallions, garlic in olive oil.
I used to live in NM and would wake up to the smell of freshly roasted Hatch green chiles from the farmers market behind my house every morning during chile season in the summer. It's the best smell ever and one of my favorite chiles. I found out that a local market here was getting a shipment of Hatch chiles and roasting them in one of those big roasters so I just went ahead a bought 8 lbs to freeze because they are that good. Viva el chile!