Sahr and Baindu Josiah-Faeduwor have operated Bintimani in Roxbury since 2009. In the 11 years since opening, the Sierra Leonean restaurant has become a pillar of Boston’s small but vibrant West African dining scene. Tucked away inside a shopping center colloquially referred to as Mr. G’s Plaza at 1127 Harrison Ave. in Nubian Square (formerly known as Dudley Square), the small shop quickly made a name for itself with dishes like spicy okra sauce; whole fried tilapia; crain crain, a