Step 2) Blister all sides of peppers over gas burner, on gas grill or under broiler. Peppers will be blackened, but still hold their shape. Place in medium bowl and cover with plastic wrap until cooled, about 10 minutes. Remove skins with sharp paring knife under running cold water. Cut a slit down the center of the pepper; stopping about 1/4-inch from the bottom tip. Place in 13 x 9-inch baking dish that has been sprayed with cooking spray.