Before pour overs, €13 coffee beans, minimalist decor and succulent plants, there was the boot of Eamon Mongey’s Opel Astra.  Mongey, a wheeler-dealer, had come across J.J. Darboven coffee at a trade show in London in 1988. “He saw the product and tasted the product and absolutely fell in love with the product and the branding and how Darboven do everything,” says his son, Graham. Eamon bought some boxes back to Ireland, and started selling it from the boot of his car. “This was long before the word espresso or cappuccino or a latte was ever mentioned anywhere, really, let…