It was a deal that required patience as well as skill. Almost two years ago, BiaVest, a food investment vehicle founded by two seasoned entrepreneurs, first approached Donegal Investment Group to see if it was interested in selling one of its prize assets called Nomadic Dairy. Stock market-listed Donegal was interested. Its team had been buying back shares in recent years and selling off assets, leaving it with just two prime businesses – Nomadic Dairy, a yoghurts company, and a separate potato seeds company. BiaVest’s founders Hilliard Lombard, and David McKernan loved Nomadic Dairy, which was selling in over 20,000…