Rhubarb-Hibiscus Lemonade

With its gorgeous deep-red colour, this lemon-free "lemonade" has everything going for it to become the drink of the summer. Lightly tart, with chunks of rhubarb, and highly fragrant thanks to the addition of the hibiscus, it'll shine on any picnic table. When serving, add rhubarb, hibiscus flowers, lime slices and ice cubes for a refreshing and resolutely summery drink.