- Divide the tonic water between two wine glasses or wide cocktail glasses.
- In a cocktail shaker, vigorously mix the remaining ingredients, except for the dried roses. Filter into the glasses.
- Decorate each glass with some dried roses and a piece of grapefruit zest, first pressing it around the rim of the glass.
Edible dried flowers or products derived from flowers are available in some specialty shops or health food stores. Rose water can be found in the baking aisle of most supermarkets.