Ingredients
1/2 cup white sugar
1/2 cup water
3 strips orange zest
2 cups cubed seeded watermelon
3/4 cup white tequila
1/4 cup lime juice
salt or sugar for rimming glasses (optional)
1 lime, cut into wedges
2 cups crushed ice, or as needed

Directions
Bring 1/2 cup sugar, water, and orange zest in a small saucepan to boil, stirring constantly.
Simmer until sugar is dissolved, about 3 minutes.
Remove simple syrup from heat and allow to cool completely.
Place watermelon in a blender or food processor.
Pulse until pureed.
Stir watermelon puree into a large pitcher with simple syrup, tequila, and lime juice.
Place a small amount of salt or sugar into a saucer.
Rub edge of margarita glasses with a lime wedge to moisten.
Lightly dip the rim of the glass into the saucer to rim the glass; tap off excess salt or sugar.
Fill rimmed glasses with crushed ice; pour margarita mixture into glasses and garnish with lime wedges to serve.