The combination of thick flakes of smoky, salty fish with fluffy, buttery mashed potato and lashings of creamy tangy sauce is heavenly. Add a soft-poached egg and flourish of chives and it’s Proper Job, as they say in Cornwall. Serves 4Prep: 20 minCook: 30 min 4 large potatoes, approx 800g80g butter 500ml milk4 thick fillets…
