Turn on your oven broiler and place baking sheet 6 inches from top coils. Cook 5 - 7 minutes or until peppers start to blister and blacken. Turn and cook another 5 minutes until peppers start to blister and blacken on that side.
Transfer peppers to a resealable plastic bag (or a paper bag) and close. Allow peppers to steam in bag for about 20 minutes. Remove from bag and gently remove skin.
Use a spoon to remove seeds from peppers.
Leave whole or dice. Store leftovers in the refrigerator and use within a few days. Or you can freeze them in freezer safe containers and use within 1 year.