This dish is one of my favorite little bites to start a meal. Prepared this way the scallops also make a great filling for temaki sushi. The bright, citrus-y, tongue numbing sansho and the creaminess of the scallop work perfectly together, plus the lightly cooked scallop holds the sauce so well. It really is a fun (and delicious) dish.
In a small pot, bring enough water to cover the scallops to a boil. Then add the scallops to the boiling water and cook for 20 seconds. Remove from the water and put on a plate and then into the refrigerator to cool.
In the meantime, add the lemon juice, mirin, white tamari and rice vinegar to a sauce pot and bring to a boil. Add the lemon zest and cool in an ice bath. Once cool, strain out the zest.
Cut the chilled scallops in half horizontally, like 2 coins. If the scallop is large enough, you may be able to get 3 coins. Place on a small plate side by side, cover with sauce and sprinkle some sansho on top. Repeat with the three remaining scallops. Garnish with daikon sprouts and serve.