Char the poblano peppers on top of a gas burner, on a grill, or under the broiler) until all of the sides are blackened. Place in a bowl covered tightly with plastic wrap, allowing the steam to help loosen the skin. With your fingers or a spoon, scrape and discard the blackened skin then remove the seeds and core. Coarsely chop the poblanos, and place into a mini food processor. Add the Parmesan, cilantro, garlic, chili powder and oil and process until well combined, but not totally smooth. Taste and season with salt.
Recipe courtesy of Melissa D'Arabian