Don't be afraid to cook with sesame oil if it's new to you! I never liked the way it smelled or looked so I avoided it. Just a little goes a long way to subtle flavor that enhances this dish without making it taste like sesame at all. Like any oil there are lots of different levels of quality. It's fine to buy a cheep bottle in your local supermarket for this recipe. I have found it at Winco for under $5 plenty of times. Now that I do SO much Asian cooking we buy it in large cans at HMart other similar stores.