Zap the cooked rice in the microwave for a few second, until hot. Pour the sushi rice vinegar over the rice and mix well with a spoon.
Heat up the dashi broth in a medium size pan until very hot. Add rice, stir and bring to boil.
When the water is boiling, lower heat, cover and let simmer for 6 minutes. Pour light soy and stir well.
Turn off the heat, pour the beaten eggs and leave for 10 seconds. Slowly stir with chopsticks or a fork to break up the egg mixture. Don’t over stir, a short swirly motion should be enough.
Put the toppings (except nori) at the bottom of each bowl, divided evenly. Pour the soup and top with shredded nori. Serve immediately.