Heat the oil in a large saucepan, and add the finely chopped carrot, pepper and leek. Cook for 5 minutes over a medium heat, until the pepper and leek are fairly soft and just beginning to brown (the carrot will still be a bit hard). Add the garlic and minced chilli, and cook for a couple more minutes.

Next add all of the remaining ingredients except for the tomato. Mix well, and bring to a gentle simmer - you may need to turn the heat down a little. Allow to cook gently until the rice is soft - you'll need to stir fairly regularly to prevent the rice from sticking, especially towards the end. If the rice is still not quite cooked when all the liquid has been absorbed, add a dash more water.