3 hard-boiled eggs
1 tablespoon mayonnaise
½ teaspoon Japanese seven spice powder
1/3 teaspoon rice wine vinegar
1/3 teaspoon mustard powder
Slice the eggs in half. Scoop out the yolks and set the whites aside. In a small bowl, mash the yolks with a potato masher. Add the vinegar, mustard powder and 7 spice powder. Beat with a fork until smooth. Spoon the yolk mixture into the whites.