Fill the rocks glass with ice cubes
Place 2 green basil leaves in the shaker and muddle
Pour in 0.75 oz of lime juice, 0.5 oz of homemade wheat cordial, and 0.5 oz of ginger syrup
Add 0.75 oz of elderflower liqueur, 0.75 oz of Becherovka, and 2 oz of London dry gin
Fill the shaker with ice cubes and shake gently
Pour through a strainer and sieve into the rocks glass
Garnish with a green basil leave and a dried lime wheel