 " Leslie 's House " is the 14th episode of the second season of the American comedy television series Parks and Recreation , and the twentieth overall episode of the series . It originally aired on NBC in the United States on January 21 , 2010 . In the episode , Leslie holds a dinner party to impress her boyfriend Justin , but ends up disappointing him when she invites her friends to join her . Meanwhile , Leslie is annoyed with her boyfriend Justin , and decides to break up with him . She is voiced by Janet Macy , and is the first actress to appear in the episode .

The episode was written by