1/2 cup Tequila
2 tablespoons Orange Liqueur
1/4 cup Coarse Salt
wedges to garnish each glass
Remove rind from whole watermelon and cut into 1-inch cubes.
Set on plastic film lined cookie sheet in a single layer and freeze until solid (about 1 hour).
In blender, combine lime juice, sugar, tequila and orange liqueur.
Add watermelon chunks a few at a time, blending into a thick, smooth slush.
If desired, pour salt onto a small plate.
Rub glass rims with a lime wedge to moisten.
Dip rims in salt to coat.
Pour margarita mixture into glasses; garnish with lime wedges.