Preheat the oven to 170C/325F/Gas 3.
Slice the melon in half and remove the seeds using a spoon.
Slice each half into four wedges and place onto a baking sheet.
Place the melon in the oven and cook for five minutes while you make the syrup.
For the syrup, place the sugar and water into a pan. Dissolve the sugar over a low heat, before turning up the heat. Add the remaining syrup ingredients and reduce by a third.
Arrange the warm melon on a serving platter, spoon over the syrup and sprinkle with chopped mint.