Add everything to a blender and blend until completely smooth.
Taste the mixture and add additional tequila or simple syrup and blend again, if desired, to suit your tastes. We think these are usually perfect as they are, but strawberries are sometimes less sweet than other times and we'll add a bit more simple syrup.
To rim the glasses:
Run a lime wedge around the rims of 4 glasses.
Dip each glass into the salt and roll to coat the rim.
Pour the margarita mix into each glass and garnish with a lime wedge and fresh strawberry. Serve immediately.
Notes
The fresh strawberries add a more fresh flavor while the frozen berries help the frozen consistency. You can skip the fresh berries if you don't have them, but the flavor won't be as fresh and vibrant.For an extra thick margarita, add more ice. For a thinner consistency, use less ice. Swap the margarita salt for sugar if you prefer a sweet rim.