(Make rosemary infused syrup) In a small saucepan, dissolve sugar in water at low heat. In an airtight container, put in rosemary and pour in the sugar water. To store, cool to room temperature, close the lid and put in the fridge.

(Make the Mocktail) In a glass put in sequence: blueberry nectar, rosemary infused syrup, ice cubes, lemon slices, soda water. Garnish with rosemary. Done.