Variation: For Sichuan peppercorn oil (hua jiao you), substitute 1/4 cup Sichuan peppercorns for the red chiles and proceed as above. Chiang recommends sprinkling this oil on already cooked foods. Don't use it to stir-fry. The heat will destroy the flavor and make it bitter. It's best on spicy dishes, for it brings out their flavor.