Boil eggs, cool and peel.
While eggs are cooking, stir together marinade ingredients, including hot water and any optional ingredients if using.
Place eggs in a container with a tight fitting lid and just wide enough to hold the eggs. Cover eggs with marinade. Let marinate for at least 2 hours, up to 24 hours.
Remove eggs from marinade, slice into halves or quarters, drizzle with some of the marinade, garnish with scallions and sesame seeds if using, and serve.
