Soak the rice cakes in water for 5 minutes.
Beat the eggs and scramble them in a pan.
Cut the rice cakes, fish cakes, and onion into bite-sized pieces.
Add cooking oil to a pan and stir-fry the onion.
Add the rice cakes and fish cakes, and stir-fry together.
Add gochujang, red pepper powder, sugar, and soy sauce, and stir-fry.
Transfer the stir-fried ingredients to a plate and top with the scrambled eggs.