The herring is like a lottery. If a female is caught, there will be roe, and if a male, there will be soft roe. Don't tell me you're throwing them away! This is the ideal protein and source of healthy "fish oil". And cooking it is easy and simple: season with salt, pepper, dip in flour and fry in oil. You can add a little twist to the dish: make a batter from eggs, flour and salt, dip roe in it and fry again.