Raspberry Sauce

Put in a small saucepan the peel of 1 lemon, a little piece of cinnamon, 1 cup water and 1 spoonful sugar; boil 5 minutes; mix 2 teaspoonfuls cornstarch with some cold water; add it to the contents of saucepan; boil a minute; add 1 cup raspberry juice or syrup and serve either hot or cold.