The Asian kind of sesame paste is called Sesame Butter, and is made from untoasted sesame seeds.
Tahini (Sesame Seed Sauce)
The Middle Eastern kind is called tahini and is made from ground, toasted sesame seeds.
In cooking and particularly in sauces, peanut butter often makes an acceptable substitute for tahini.
Store tahini in refrigerator in closed jar for up to six months to prevent the fat in it from going rancid. If the oils and solids separate during storage, just stir them back together.
Tahini comes from an Arabic word meaning “to grind”.