2.

Meanwhile, roast poblano and cubanelle peppers by placing them directly over the flame of a gas stove until deeply charred on all surfaces, about 10 minutes total. If you don't have a gas burner, you can achieve similar results under the broiler, or on an outdoor grill. Place peppers in a bowl and cover with a large plate. Let steam for 5 minutes, then peel under cool running water. Dry chilies, discard seeds and stems, and roughly chop. Transfer to bowl of food processor.