In a small saucepan placed over moderate heat, combine water, sugar, star anise and lemon juice. Stir and cook until sugar dissolves and water comes to a bubble. Add blackberries and cook 30 seconds. Remove pan from heat and let stand a 1 or 2 minutes, stirring occasionally. Remove star anise. Scoop lemon sorbet into 4 small dessert cups. Top lemon sorbet with star anise and blackberries and garnish desserts with 2 Piroline cookies or dessert wafers.