Peel and cut up one mango.
Add the mango to a blender with a Tbsp or two of water.
Puree until it reaches the desired consistency.
Refrigerate for at least 2 hours prior to using. If you don't have enough time to chill the mango puree, add a few ice cubes to it in the blender and throughly combine.
Wet the rim of your cup with either water or lime juice. Coat the rim with the spicy salt.
Add an ice cube in the cup.
Pour in one shot of Mezcal.
Pour in the puréed mango and top off with club soda.
Garnish with a slice of mango.