Brendan Fleming has come straight from training in the National Handball Centre in Croke Park. “I have an All-Ireland final there next week,” he explains over coffee. In front of us on the table is an array of energy ball snacks. “I took two of them after my training session and that will do me now until dinner later,” he says. Fleming is the managing director and co-owner of The Sibly Food Co. Based in Ballydesmond, Co Cork, the business sells its nutritious balls nationwide and is projecting sales of €3 million this year. It is just launching in Dunnes…