A few drops of fragrant nutty sesame oil can completely change a dish. It's got deep toasted sesame flavor but is nonetheless light and flexible at the same time. Prized among South Asian and East Asian cuisines, the dark-colored oil is made from roasted white or black sesame seeds that have been pressed. Use a few drops with soy sauce, grated ginger and mayonnaise for a quick dressing or drizzle over fried rice or stir-fry to add a musky undertone.
But remember: This isn't a frying oil. Better to think of it as a condiment rather than a something you cook in. Like any oil, it goes rancid more quickly than you expect, so buy it fresh in small amounts, keep it out of direct sunlight and use it up in a few weeks. Once you start using it, that shouldn't be too much of a challenge.