My mother would serve roe with cooked cod's liver, cooked cod or haddock, and potatoes, sometimes with melted sheep's tallow (with cracklings) or butter, and rye bread on the side.
To cook the roes, drop them into boiling salted water and cook for 15 to 45 minutes, depending on their size. The roe is cooked when firm and of an even pale pink colour all the way through.
Drain well and serve warm or cold. Cold roe can be sliced and used as a topping for bread.
To cook cod liver, soak in cold water for about 30 minutes, to allow any nematodes to crawl out (this is why I do not eat fish liver). Remove the membrane from the liver, drop into heavily salted boiling water and cook for about 10 minutes. Some like to cook the liver, fish and roe together, but as the liver imparts a strong flavour to the cooking liquid, I recommend cooking it separately.
If the roe is to be serv…