Step 1

Muddle strawberry with a mortar and pestle or puree in a small food processor.

Step 2

Bring the water to a boil and stir in granulated erythritol until dissolved.

Step 3

Reduce heat, add strawberry puree, serrano pepper slices and lime juice, and simmer five minutes.

Step 4

Allow to cool. This is important!

Step 5

Rub a lime wedge around the rim of each large margarita glass and then dip into the kosher salt.

Step 6

Fill glasses with ice. Add 1 1/2 ounces tequila to each glass and top with strawberry lime mixture.

Step 7

Add a pinch of kosher salt to each glass and give a quick stir.

Step 8

Garnish with whole strawberries, lime slices or wedges and/or additional serrano pepper slices.