To "roast" and peel green chilies at home you will need a baking sheet, a plastic grocery sack, tongs, and an oven.
Place one layer of green chilies on baking pan. Turn oven on high broil and place the chilies on top rack. Cook the chilies until they are blackened and the skin pulls away from the chilies. Take the baking sheet out and flip the green chilies to the other side and place pan back in oven to repeat the process. Once all sides of the chilies have blackened, remove them from the oven and place in a grocery sack and tie shut.
Leave in the bag for 15-30 minutes and gently begin peeling (when they still warm but not too hot to handle). Rinse chilies and remove seeds to put them into your favorite recipes!