Simple Syrup:

In a small pot heat the water and sugar and stir until dissolved. Remove from the flame and set aside to cool to room temperature.

Lime Zest & Mint Sugar:

In a wide bowl, combine the sugar, mint, and lime zest.

Watermelon Mojito:

Rub the edge of a glass with a lime wedge, then turn the glass upside down and rub the wet rim in the lime zest and mint sugar.

In a medium sized cocktail shaker muddle the mint leaves and lemon wedge. Add in the watermelon juice, simple syrup, a pinch of Lime Zest & Mint Sugar, and ice. Shake for about a minute, until the drink is cold. Add some watermelon cubes to the glass followed by the mixed drink. Top the drink with some fresh mint leaves and serve immediately.