Sparkling Raspberry Lemonade - cooking recipe

Ingredients

1 (12 ounce) package frozen unsweetened raspberries (about 3 cups)
1 cup sugar
1/2 cup water
1 1/2 tablespoons grated lemons, rind of
1 cup fresh lemon juice
1 (1 liter) bottle chilled sparkling water or (1 liter) bottle club soda
ice cube
fresh raspberry (optional)
lemon slice

Preparation

Combine frozen raspberries, sugar and 1/2 cup water in medium saucepan.
Stir over medium heat until sugar dissolves and berries thaw.
Increase heat and boil 3 minutes.
Strain raspberry mixture into bowl, pressing on solids to extract as much liquid as possible; discard solids in stainer.
Mix lemon peel into raspberry syrup in bowl.
Chill until cold.
Stir raspberry syrup, lemon juice, and sparkling water in large pitcher to blend.
Fill 6 glasses with ice cubes.
Pour raspberry lemonade into glasses.
Add fresh raspberries to each glass, if desired.
Garnish with lemon slices and serve.