To toast either sesame seeds or pine nuts, heat a small skillet over medium heat. Add the seeds (or pine nuts) and cook, stirring occasionally, until toasted, about 1 minute for the seeds or slightly longer for the pine nuts. Transfer to a plate and let cool completely. Chef Talk: Kewpie Mayonnaise Kewpie is a brand of Japanese mayonnaise with a creamy texture and less tangy taste than American mayo. It is sold at Asian markets and online.