Cut fresh pears in half. Keep peels on. Remove stem and seeds. Place 1/2 pear on each plate. In saucepan over medium heat, combine sugar, cornstarch, orange juice, and cinnamon. Cook until thickened, stirring constantly. Add blueberries to saucepan, to warm them up. Remove from heat and add flavoring. Gently spoon warm blueberry mixture over pear half. Top with whipped cream or yogurt. Serves 4-6. Can serve with a small slice of cheddar cheese on the side.