Start off by charring the chiles. You can either do them directly on the grates of your gas grill or you can do it in your oven using the broil function. If using a gas grill, place the chili directly on the grate and turn the gas up to high and let the skin blister and turn black. Use a pair of tongs to flip and char evenly. If using the oven, turn the oven to broil and place the chilis on the rack closest to the top of the oven. Keep and eye on them as they turn black and turn, using tongs, as needed.
When all the skin is charred, place the chili in a bowl, cover, and let sit. The steam will help the skins slip off more easily.
When the chilis are cool, rub away the charred peel and cut away the stem.
If you are adverse to spice, remove the seeds and ribs.
Chop into small pieces and set aside.