3/4 cup cubed watermelon plus 2 small wedges, for garnish
4 ounces tequila
2 ounces orange liqueur, such as Cointreau
2 ounces fresh lime juice plus 2 wedges, for garnish
1 tablespoon confectioners' sugar
1/4 teaspoon kosher salt
Combine 1 1/2 cups ice, the cubed watermelon, tequila, orange liqueur, lime juice, confectioners' sugar, and salt in a blender. Blend until smooth. Divide between 2 glasses and garnish each glass with a lime slice and watermelon wedge.