Cut the pollock roe in half and scrape out the eggs.
Boil the udon noodles in boiling water and drain.
Melt butter in a pan, add the pollock roe, and stir-fry over low heat.
Add the udon noodles to the pan, then stir-fry with soy sauce and cooking wine.
Transfer to a bowl and top with seaweed flakes and chopped green onions.