Briefly submerge 50g of dried pollack strips in water to rehydrate them.
Rinse gently and drain the water.
If there are any bones, remove them.
Cut the pollack into 4cm (1.6-inch) lengths.
Heat 1 tablespoon of toasted sesame oil in a heavy-based pot over medium-high heat.
Add the prepared pollack and 1 teaspoon of minced garlic. Sauté for 2-3 minutes until fragrant.
Add 100g of thinly sliced radish and continue sautéing for another 3-5 minutes.
Pour in 1 cup of the prepared Korean soup stock.
Cover and bring to a boil for 3-5 minutes.
Add the remaining 4 cups of soup stock, 1 tablespoon of Korean soup soy sauce, and 1/2 teaspoon of fine salt.
Lower the heat to medium-low and simmer for an additional 10 minutes.
Add 150g of cubed tofu and 100g of soybean sprouts to the pot.
Increase the heat to medium-high and bring to a rolling boil for about 3-5 minutes.
Add Eggs and Garnish (Optional)
Slowly pour in 2 beaten eggs, stirring gently to create egg ribbons in the soup.
Add 10g of sliced green onions and, if desired, green or red chilies.
Add ground black pepper according to taste.
Serve the soup hot with steamed rice and Korean side dishes (banchan) for a complete meal.