Rinse the rice under cold water until the water runs clear. Soak the rice for at least an hour then drain.
In a large pot, combine the rinsed rice and chicken bone broth. Bring to a boil over high heat, then reduce the heat to medium-low heat, stirring occasionally for about 20 to 30 minutes. When the broth has reduced, stir more frequently and reduce to low heat.
Stir in finely chopped carrots and mushrooms and simmer for another 10 minutes until the vegetables are soft.
Add the shredded cooked chicken and stir in soy sauce and sesame oil. Season with salt and pepper to taste. Adjust the seasoning according to your preference.
Add chopped green onions to the porridge and mix well.
Ladle the jook into bowls. Drizzle with a bit of sesame oil and garnish with additional green onions, sesame seeds and any optional toppings you prefer.