There are two kinds of sesame oil. Un-toasted and the toasted variety. Un-toasted sesame oil is made from raw, pressed sesame seeds and is best used for cooking. Toasted sesame oil is made from toasted, pressed sesame seeds and should not be heated. This oil has a rich, earthy yet delicate taste and a tiny bit goes a long way. It can take on a bitter taste when heated so use only for drizzling. Un-toasted sesame oil can be hard to come by in Australian supermarkets. It's often found only in Asian grocery stores.