Tip the sugar, vanilla pod, cardamom, lime zest and juice into a food processor, then blitz until blended, or mash together using a pestle and mortar.

Tip the fruit into a shallow baking dish, then toss in the sludgy sugar.

2)Roast for 20 mins until the fruits have softened, but not collapsed and the sugar and fruit juices have made a sticky sauce.

Any leftovers will keep in the fridge for up to 2 days