Place noodles into Smart Multi-Cooker Base. Add 3-4 cups water to the indention on the Base. Place into microwave uncovered and cook 5 minutes.
Remove from microwave and drain using the Large Shielded Colander. Transfer into a bowl, cover and set aside.
Rinse and quickly clean Smart Multi-Cooker Base, before filling with 13⁄4 cup chicken stock. Place in the miso, ginger, mirin, tamari and garlic. Place the Large Shielded Colander on the Smart Multi-Cooker Base and place in the chicken breast. Sprinkle with shiitake mushrooms, cover with Shielded Cover and cook for 8 minutes.
Remove from microwave add the Shallow Colander, add the bok choy to Shallow Colander, cover and cook for a further 5 minutes.
Remove chicken and shred with two forks.
Divide noodles into two bowls and top with shredded chicken and broth. Place butter into bowls and top with extra hot stock or water, as needed. Serve with mushrooms, bok choy, boiled eggs, chili, spring onions, chili oil and nori.