I've seen recipes that call for frying or sauteing in sesame oil but I prefer an unseasoned oil for that and sesame added at the end . I think of it as flavoring much the same as vanilla is used to flavor cake batter
Definitely onions; also a sesame oil finish.
Celery, sliced fresh garlic, thin sliced steak, water chesnuts, sometimes fresh green beans, snow peas, cabbage, a dash of soy sauce.