In a large bowl, soak the rice cakes in warm water for at least 5-10 minutes to acclimate them. Strain and set aside.
In a small bowl, mix together anchovy stock and cornstarch. Set aside.
Heat vegetable oil in a large non-stick pan on medium heat.
Fry the roasted black bean paste in the oil for 1 minute constantly stirring it.
Then add in onion, green onions and fish cakes. Mix until well combined.
Stir in cornstarch stock mixture until combined with other ingredients. Bring to a boil and reduce to a simmer for 5 minutes on medium heat or until sauce has thickened.
Mix in strained rice cakes. Season with sugar and oyster sauce to taste. Simmer for 5-10 minutes until rice cakes are soft but chewy or fork tender. Remove off heat.
Garnish with more green onions and sesame seeds and enjoy!
