Now This Is The Gin Basil Smash

Watch 30 mins of TV a day and enjoy a Gin Basil Smash with me. Also, let me know if you know who Alfred is! Don't forget to top woth soda. 
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1 oz (30 ml) Lemon Juice
3/4 oz (22 ml) Simple Syrup 
1.75 oz (52 ml) Gin
Basil Leaves