2 oz. (mixed with water, diluted) Moutarde de Dijon
1 oz Beefeater Gin
1 oz Martini Bianco (or another sweet white vermouth)
1 oz Cointreau
Take a highball glass and fill with ice. Fill the metal half of your shaker with ice. Add ingredients into glass half of shaker (not including decorative ingredients).
Shake and strain into highball glass. Decorate with mint leaves, carrot slices and blueberries.