In a mixing glass, mash the rhubarb. Add ice and other ingredients according to recipe, except tonic water. Shake and strain through a strainer into a chilled glass filled with ice. Top up with tonic water, stir and serve.

In a mixing glass, crush the basil. Add the ice and the other ingredients. Shake the drink vigorously and strain into a chilled glass filled with ice cubes using a strainer and a spatula.