If your rice cakes or fish cakes are frozen, take them out 1-2 hours beforehand and let them thaw at room temperature. This ensures they cook evenly.
(Optional) If you want to include boiled eggs, bring a pot of water to a boil. Add the eggs and boil for 10 minutes for a fully cooked yolk. Once done, transfer them to cold water and peel.
Cut the green onion into 1 cm pieces. Slice the radish into thin pieces (about 0.2-0.3 cm thick).
In a small bowl, mix together all the seasoning ingredients until well combined. Set aside.
Heat a pan over high heat and grease it with perilla oil or sesame oil. Add the sliced radish and stir-fry for about 2 minutes until slightly softened.
Pour ¼ cup of water into the pan, add the seasoning sauce, and mix well. Once the mixture starts boiling, reduce the heat to low and let it simmer for 5 minutes.
Add the rice cakes, fish cakes, and boiled eggs (if using) to the pan. Stir everything together and let it cook for 6-7 minutes, allowing the rice cakes to soften and absorb the sauce.
Add the sliced green onions, stir well, and let it simmer for an additional minute. The sauce should be thick and well-coated on the ingredients.
If you want an extra layer of flavor, sprinkle shredded mozzarella cheese on top and lightly torch it with a cooking torch for a smoky, melted finish.
Plate your radish Tteokbokki and serve it hot. It pairs incredibly well with Gimmari (fried seaweed rolls) for the ultimate Korean street food experience.