Rinse the tteokbokki rice cakes in cold water.
Cut the onion, green onion, and fish cake into bite-sized pieces.
Heat olive oil in a pan and sauté the green onion and onion.
Add the fish cake and stir-fry together.
Pour 200ml of water and bring to a boil.
Add low-sugar tomato sauce, chili powder, soy sauce, and erythritol instead of gochujang.
Add the rice cakes and boil for 5 minutes.
Once the sauce thickens a bit, check the seasoning and finish.