Make the simple syrup by combining the monkfruit with the water in a pot over medium heat. Bring to a simmer until reduced and it has the texture of syrup. This should take about 5-7 minutes. Let it cool down. You will use just about ¹/₄ of it. Store any leftover syrup in a jar for future use. slice the jalapeño pepper.

Squeeze the limes.

Place the jalapeño into a cocktail shaker and muddle until broken down. Add in some ice, the freshly pressed lime juice, simple syrup, and tequila. Shake until combined and strain into a small glass over ice.

Garnish with an extra slice of jalapeño, salt and lime.