How to Make It
In a small saucepan over medium high heat, whisk together 1 cup water and 1 cup granulated sugar. Add lemon peels, juice, and star anise pods. Bring mixture to a boil, then stir until all the sugar is dissolved. Take the syrup off the heat and set aside to cool.
Slice a medium watermelon into 1 inch-thick wedges. Arrange in a baking dish (1 layer divided among 2 baking dishes is best, but you can double the layers of melon if you'll remember to give them a toss halfway through chilling)
Strain the syrup through a fine mesh sieve, then stir in tequila. Pour syrup over the watermelon wedges, then place in the fridge for at least 1 hour, but up to 12 for sharper flavor. Serve with a sprinkle of flaky sea salt.