Put the brains in cold, salted, acidulated water for half an hour. You now need a dexterous, unsqueamish and preferably stoned kitchen intern to peel off the membrane and excise bone shards. This is time-consuming.
Put the brains in more cold, salted, acidulated water. Bring gently to a simmer. Poach them for 15 minutes.
Allow them to cool. Remove any bits of membrane that remai