
Heat a shallow pan over medium-low heat. Add the sesame seeds and spread them out evenly across the pan. Toast for 3 to 5 minutes, constantly stirring to prevent the sesame seeds from burning. Once the sesame seeds are slightly browned and fragrant, transfer them to a spice grinder or mortar and pestle. Grind into a fine powder then transfer to a small mixing bowl.
In the bowl with the ground sesame seeds, add Japanese kewpie mayo, sugar, low-sodium soy sauce, rice vinegar, and sesame oil. Mix until the dressing is well combined. Be sure to taste and adjust according to your preferences. For example, if you prefer a sweeter dressing, just add a bit more sugar.
Serve and enjoy with your favorite salads!
Transfer the dressing into a glass airtight container or jar. Store in the fridge for up to one week.