Raspberry Syrup - cooking recipe

Ingredients

1 cup strained raspberries
1 teaspoon lemon juice
1/4 teaspoon grated lemon rind
1 tablespoon cornstarch
3 tablespoons sugar
3 tablespoons cold water
1 tablespoon butter (optional)

Preparation

Mix cornstarch, sugar, lemon juice, rind and cold water to make a smooth paste.
Stir strained raspberries into paste gradually until smooth.
Heat in saucepan until mixture boils and thickens.
Stir constantly.
Remove from heat.
Add 1 Tbsp butter if desired.
Serve warm.