Combine sugar and 1/2 cup water in a small saucepan over medium-high heat. Cook 3 minutes or until sugar dissolves, stirring constantly. Transfer syrup to a small bowl; set aside.
Melt butter in pan over medium heat. Add pear to pan; cook 3 minutes or until soft, stirring frequently. Return syrup to pan; stir in fresh lemon juice, vanilla extract, ground cardamom, and freshly ground black pepper. Cook 5 minutes or until sauce is slightly thickened.