Substitute for sesame oil (sesame allergy) My family eats a lot of stir fries and sesame oil is a critical ingredient in many of them.  Unfortunately, my wife is allergic to sesame so we need an alternative.  Has anyone had success recreating the sesame oil flavor with a non-sesame-based food?
Sesame oil has such a distinctive flavour, I'm afraid there's nothing that will give you exactly the same taste. Many sites suggest peanut oil, but this is more or less tasteless in my experience.

I would suggest toasting some unsalted peanuts or cashews and adding them to the stir fry, to get that roasted, slightly smoky flavour. Just add them to a warm, dry pan and toss frequently to prevent burning.

If you're feeling really adventurous you might even try smoking some peanuts (you can do this in a wok with certain wood chips and a bamboo steamer, plenty of instructions online).