Soak the rice cakes in cold water for about 10 minutes.
Slice onions and scallions.
Stir-fry chicken breast, onions, and scallions in a pan over medium heat.
Add spicy rice cake powder sauce and water, then bring to a boil.
Add the soaked rice cakes and boil over medium heat for 5 minutes.
Lastly, add soaked glass noodles and boiled eggs, then simmer for another 3 minutes.
Top with mozzarella cheese to taste.