Pour the mango puree into a saucepan.

In the carafe of your blender, combine the sugar and mint and blend until combined. Add this mint sugar to the mango. Finally, add the lime zest and juice.

Place the pot on the stove over high heat and bring to a low bubble. Reduce the heat to medium and cook for 10 to 15 minutes, stirring constantly, until the mango reduces a bit.

When you like the consistency, remove the pot from the heat. Position a fine mesh sieve over a small mixing bowl and pour the mango sauce through the sieve. Work it with a silicone spatula, until all that remains in the sieve is bits of lime zest and mint.

Pour the finished mango sauce into a container and refrigerate.