Combine black sesame seeds and Tajin on a plate and rim glass with lime juice.
Then swirl the glass to coat the rim in the salt and seeds.
Build your drink in a shaker tin with Chopin Vodka, Curacao, lime, watermelon juice and syrup.
Add enough ice to fill glass, cap with other side of tin, and shake for 7-8 seconds.
Then uncap and pour the contents of your shaker directly into a Collins glass and serve.