Johanna Hartzheim, co-founder of Wildgrain, turned a personal craving into a multimillion-dollar business, proving that sometimes the best entrepreneurial ventures start from the simplest of needs. Four years ago, Hartzheim and her husband, Ismail Salhi, were longing for the fresh, artisanal bread and pastries they had enjoyed in Paris. When they couldn’t find comparable options in the U.S.
