Combine all ingredients, except the crushed ice, in the blender jar.
Fill blender jar to the 5 cup mark with crushed ice.
Cover and crush ice until drink appears slushy and smooth.

Rub the rims of four Margarita glasses with a lime. Dip in Kosher salt.

Fill each glass and serve.

Strawberry Margaritas:
• Add 8 ounces frozen strawberries packed in heavy syrup to the blender jar, before adding the crushed ice.