Add the strawberries to a blender and purée until smooth. Strain the purée if desired. You'll have more strawberry purée than you need. Store the leftovers in an airtight container in the fridge for up to a week.

Add 3-4 ounces of the strawberry purée or juice, tequila, mezcal, Cointreau, agave syrup and lime juice to a jar or cocktail shaker. Shake until well combined.

Run a lime wedge around the rim of two margarita or low ball glass and then dip them in coarse kosher or sea salt. Add ice to the glasses and divide the margaritas evenly into them. Garnish with a strawberry or lime wedge.