Marinate the scallops in the sake and spring onion for 15 minutes. Remove scallops and drain.
Meanwhile, heat a grill and brush with the oil. Cook the scallops for 2 minutes on both sides. Remove from the heat and, when cool, cut the grilled scallops into 1-cm (½-in) cubes.
Moisten hands with the tezu. Take 1 tablespoon of the Sushi Rice and fo