A basin for installation into an opening defined by a kitchen countertop, the countertop having a substantially uniform planar top surface, where the basin includes a wall defining a reservoir, a ledge disposed along at least a portion of the wall and a cover contacting the ledge within the reservoir such that the cover top side is level with the countertop surface. The basin cover underside receives and retains a cutting board which may be accessed by a user and removed for use anywhere in the kitchen.