Prepare your shot glasses: Moisten the rim of each shot glass with a lemon wedge, then dip the rim into a plate of granulated sugar. Set aside.

In a cocktail shaker, combine the vodka, freshly squeezed lemon juice, and simple syrup.

Fill the shaker with ice. Secure the lid tightly and shake vigorously for about 15-20 seconds, until the shaker is well-chilled on the outside.

Strain the mixture evenly into the prepared shot glasses.

Garnish each shot with a small twist of lemon zest, if desired.