Prepare the scallops: Take 4 scallops out of the shell, and remove the orange coral. Wash the shells thoroughly, and set them to one side.
Prepare the marinade: Make the marinade by putting 2 tsp yuzu paste into a deep saucer. Spoon 3 tbsp water over the yuzu paste, and use the back of a teaspoon to mix it together.
Marinate the scallops: Place the scallops in the marinade for 10 minutes, turning them over half way through.
Rehydrate the wake seaweed: Next, bloom 10g dried wakame by putting it in a dish and covering it with warm water.
Prepare the dressing: Make a dressing for the seaweed by mixing together 2 tbsp rice wine vinegar, 1 tbsp sake, 1 tbsp soy sauce and 1/2 tsp caster sugar.
Sear the scallops: Heat the oil in a cast iron skillet. When it's just starting to smoke, put the scallops on the pan and cook for 2 minutes either side. Before you finish cooking, tip the remaining marinade over the scallops in the pan.
Serve and enjoy: To serve, toss the seaweed in the dressing and divide it between 4 scallop shells. Place a scallop on each seaweed bed and garnish with the sesame seeds. Serve immediately.