To make the mango puree, combine 1 peeled + chopped, ripe mango in a food processor (or high speed blender) with the juice of 1 lime, and process until smooth (or at least almost smooth).

In the bottom of a glass, add 1 ounce of simple syrup and the mint leaves. Muddle with a muddler or use the clean bottom of something blunt, like a screwdriver! Add ice to the glass, and pour rum, syrup, mango puree, lime juice and club soda over top. Mix with a long spoon or knife and serve with an additional sprig of mint.

Note: depending on the sweetness of your fruit, you may want to add more/less simply syrup, so I suggest tasting as you go. Same with the rum – add more if you like your drinks strong. Malibu also makes a mango rum that you could combine with traditional coconut rum.