Channa Dal is a yellow split pea, Urad Dal is a white split gram bean and can be found in specialty Indian stores and health food stores, as well as the spice seeds. Dry Roasting means to roast without adding oil, using a hot, dry skillet. Can be found in some supermarkets and health food stores A string hopper press is a tool used for extruding dough, similar to the way a pasta machine extrudes noodles. It is usually made of wood or metal and can be found in specialty Sri Lankan stores. Thatu are perforated disks made of plastic or woven bamboo. They are the forms the string hoppers are steamed on. Thatu are also available at Sri Lankan stores.