Cut the top part of a bun then removed the middle part
Bring a pot of water and egg to a boil then dimmer down low for 10 minutes then drain in runny water and removed egg shell
Separate the egg white and egg yolk then lightly mash both seperately
Add a little mayonnaise on egg white then fill into the bun cavity ,top the mash egg yolk then top with some wasabi or any mustard you prefer top with a,dash of worchestershire sauce,
BELOW ARE FEW EGG RECIPE,I AM GLAD TO SHARE WITH YOU
https://cookpad.com/us/recipes/351677-scrambled-egg-in-a-shell-golden-egg
https://cookpad.com/us/recipes/351159-baked-egg-meringue
https://cookpad.com/us/recipes/348836-avocado-and-egg
https://cookpad.com/us/recipes/351601-egg-in-spice-french-bun
