Clean and prepare the cod milt (goni) thoroughly.
Rinse and prepare the bean sprouts.
Cut the water dropwort (minari), green onion, and onion into bite-sized pieces.
Layer the bean sprouts and cod milt in a pot.
Add seasonings such as red pepper flakes, minced garlic, soy sauce, and salt.
Place the water dropwort, green onion, and onion on top of the ingredients.
Steam over high heat, then lower to medium heat until cooked through.
Finish by sprinkling black pepper to taste, if desired.