Add <quantity>¼<unit>cup</unit></quantity> of sugar to a pan

Add <quantity>1<unit>tsp</unit></quantity> of vanilla extract

Grate nutmeg to taste

Add <quantity>500<unit>ml</unit></quantity> of brewed yerba mate tea and mix it

Turn the heat on to medium, and let it boil until the liquid is reduced in half

Transfer the liquid to another recipient. The yerba mate syrup is ready

Fill a glass with ice cubes

Add <quantity>50<unit>ml</unit></quantity> of the Yerba Mate Syrup and <quantity>50<unit>ml</unit></quantity> of rum

Fill the remaining of the glass with <quantity>150<unit>ml</unit></quantity> of tonic water and <quantity>50<unit>ml</unit></quantity> sparkling water. Stir to combine

Cut <quantity>½</quantity> lime into wedges

Squeeze the juice out of 1 lime wedge into the cup, and add the wedge to the glass. Use a stirring spoon to push the lime wedge down

The Sí, Es Libre is ready! Enjoy!