Combine sauce ingredients in a small bowl. Mix until blended, then set aside.
Over medium heat, heat neutral oil on a nonstick pan, then add whites of scallion, onion and garlic and stir for about 1 min.
Add day old sushi rice, then break them up with a spatula.
Add kimchi, stir briefly, then pour sauce mixture into the pan and immediately mix until thorughly combined with the rest of the ingredients.
Plate, then top with remaining chopped greens of scallions, optional sunny side up egg and shredded nori. Enjoy!