Place the lime juice, agave nectar and mango puree in the bottom of a cocktail shaker. Add the rosemary leaves and using a wooden spoon or stick, muddle the rosemary to release the oils. Add the sherry, tequila and a pinch of chili powder. Shake the drink and strain to remove the rosemary leaves. Add ice and shake again vigorously.
On a small plate, mix together a pinch of chipotle chili powder with the cane sugar. Run the slice of lime around one-quarter of the edge of each cocktail glass and dip it in the sugar mixture.
Strain the drink into the cocktail glasses and garnish with the rosemary stem.
This recipe was provided by a chef, restaurant or culinary professional. It has not been tested for home use.