Sardines & Soured Onions on Toast

Sardines are a member of the herring family, small oily fish with a distinctive ‘fishy’ flavour. They’re popular in the United Kingdom, where Jeremy Strode grew up, and are often served with a vinegary accompaniment, like these soured onions, which cuts through their oiliness. If you haven’t been a sardine fan up until now, give them a try this way. Most fishmongers sell sardines already butterflied (with the head and back bone removed, leaving the two fillets joined along the back); it’s a