For the Mango Puree:

1. Combine the defrosted mango and lime juice in a blender and puree until completely smooth. If needed, add a splash or two of water to the blender to get the puree really smooth.
2. Transfer to an airtight container and refrigerate until you are ready to use the puree.

For Cocktails:

1. To a pitcher or serving carafe, add the mango puree, lime juice, vodka, and most of the mint sprigs.
2. Stir to thoroughly combine. Transfer the pitcher to the fridge until the mixture is thoroughly chilled.

To Serve:

1. Fill glasses with ice and add ⅓ cup of the mango mixture to each glass.
2. Top each glass off with ½ cup of the ginger beer. Garnish with additional mint, lime wedges, and/or mango slices. Serve immediately.