Use small hot chilies about 3 to 10 cm long. Roast whole chillie stems and all, in a dry wok or skillet until the color changes to dark red or brown depending on the chilies used. Be careful not to let them burn. When the chilies have cooled, remove the stems and seeds. Place the chilies in a food processor or blender and grind using short pulses. Pre-ground chilies are also commercially available, but often lack the "bite" of home ground ones and may be more expensive. * Place uncooked rice in a dry wok or skillet and heat over moderate heat until deep golden brown,s tirring frequently to keep from burning and to allow it to develop a uniform color. Watch the rice carefully after it begins to change colorand stir constantly because it can burn easily at this stage. When it is auniform deep golden color, remove from heat and allow to cool to room temperature. Grind it to a fine powder in a blender or a spice grinder. This can be made in advance and kept in quantity so that there is always a supply on hand, but it is also easy to make up while preparing the dish.