Before pour-overs, €13 coffee beans, minimalist decor, and succulent plants, there was the boot of Eamonn 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. Eamonn brought some boxes back to Ireland and started selling them from the boot of his car. “This was long before the word espresso or cappuccino or a latte was ever mentioned anywhere, really, let…