Cut the rice cakes, sausages, and beef brisket into bite-sized pieces.
Add the beef brisket and sausages to a pan and stir-fry over medium heat until enough oil is rendered.
Add the rice cakes to the oil and stir-fry together.
Add gochujang (Korean red chili paste), sugar, soy sauce, and minced garlic, and mix well.
Pour in the water and red chili powder, then bring to a boil.
Simmer until the rice cakes become soft.
Finish with chopped green onions and black pepper.