This is a wonderful stir-fry sauce that I recently developed, if you don't use all the sauce up at one time it may be refrigerated tightly sealed in a glass bottle for another time just make certain to shake it up really well before using as the cornstarch settles to the bottom, I have left the chili sauce as optional if you like some heat then add it it, this is a fairly thick sauce, for a thinner sauce you may reduce the amount of cornstarch slightly --- don't omit the sesame oil it is what makes this sauce, and if you don't have any run out and get some you will never cook Asian again without it!