My mom started making this for us when we lived in Southern California. It remains one of my favorites. It's important to use the specified peanut oil in the sauce. The taste adds something special to it. If you do not have access to Anaheim chiles, please see http://www.foodsubs.com/Chilefre.html for possible substitions. The only one I haved tried are whole canned green chiles. If you used those, you would not have to parboil them.