Heat a little oil in a wok. Add the carrots and stir fry for 30 seconds, then add the spring onions and stir fry for a minute.
Add the chillies, half the ginger and the garlic and stir fry for 30 seconds. Add the tomato dice and stir fry for another minute. Season, remove, and place in a warm serving dish.
Wipe out the pan, add a little more oil and when it is very hot quickly seal the prawns on both sides. Add the remaining ginger and the mangoes. Splash in the rum and flambe.
Arrange the prawns, mangoes and their juices on the bed of stir fried vegetables and serve with rice.