1 bottle of Prosecco
2 tablespoons sugar
2 tablespoons lemon juice
1/2 tablespoon grated lemon zest
1 cup frozen raspberries
Combine sugar and juice in a small saucepan, and bring to a boil. Reduce heat and simmer for 1 minute, stirring until sugar dissolves. Remove from heat.
Stir in lemon rind and ½ cup of mashed raspberries.
Combine raspberry and lemon mixture and Prosecco in a pitcher.
Sprinkle remaining raspberries among the glasses.