Open natto package. Squeeze-in soy sauce packet. Squeeze-in hot mustard packet. Use chopsticks and give it a stir - until it begins to foam.
Scoop out ½ a whole avocado. Chop it into bite-sized chunks. Then season it with salt (few pinches), black pepper (few cracks) and few squeezes of lemon (or lime).
Mix the avocado pieces into the natto mixture. Give it a good stir.
(Optional: Fry an egg. Place it over your rice. Then season the egg by drizzling on a small dash of sesame oil and soy sauce.)
Now place the avocado & natto mixture around the egg. Bon Appetit!