Put lemon sorbet and vodka into a shaker with just a few ice cubes. Shake vigorously. Pour into a martini glass. In another shaker, mix the raspberry puree and St. Germain, top the glass slowly with it. Garnish it with a fresh raspberry.
Raspberry puree can be prepared on a blender or muddled.
Combine: 1 oz. fresh raspberries, 1 teaspoon of sugar and 1/2 oz. of St. Germain