Make '''that''' item, over 80 quality so you don't have to make it twice. Iksy will challenge you to a cook-off, whatever Atelier you happen to be at (stalker!). Bring the Brunch to him. ''You must win.'' You'll be rewarded with a Water of Life and Head Chef's Gift.
After, there's an event with Iksel. Rorona calls him a meanie.
By the way, you need 500,000 Cole for the Wealth end. See Money for the best (if utterly boring) way.