01 -  Arrange the eggs in a saucepan and cover with cold water. Heat over medium-high until boiling, then lower the heat and simmer for 10 minutes. 
 02 -  Quickly transfer eggs to a bowl containing ice water. Let chill for 5 minutes before peeling each egg gently. 
 03 -  Slice each egg in half lengthwise. Carefully extract the yolks, transferring them to a clean mixing bowl. 
 04 -  Mash yolks thoroughly using a fork until smooth. Incorporate mayonnaise, wasabi paste, rice vinegar, Dijon mustard, salt, and black pepper, mixing until the filling achieves a creamy consistency. 
 05 -  If desired, blend in green food coloring to intensify the hue of the filling. 
 06 -  Fill each egg white cavity with the wasabi mixture, using a spoon or piping bag for a decorative effect. 
 07 -  Sprinkle with thinly sliced chives or green onions and black sesame seeds. Refrigerate until ready to serve.