In food processor fitted with metal blade, process cilantro, onion, lemon juice, cumin, salt and pepper until smooth. In small saucepan, over medium heat, cook mixture 1 to 2 minutes or until heated throughout.
Season with salt, pepper and garlic powder the tenderloins. In large non-stick skillet over medium heat, saute tenderloins in oil 4 to 5 minutes per side or until the tenderloins are no longer pink in center and the internal temperature reaches 165 degrees F.
To serve, spoon 2 tablespoons sauce on each of four plates. Place tenderloins over sauce.