Heat the oil in a sauce pan over medium heat. Cook and stir the carrots, oil, onion, and garlic in the hot oil until soft, about 10 minutes. Cut chillis while waiting (see warnings). Transfer the mixture to a blender or food processor. Add the habanero peppers, water, lime juice, vinegar, tomato and lime zest to the blender/processor and blend until smooth. Season with salt and pepper to taste, transfer the mixture to a saucepan and simmer for 3-5 minutes. Simmering at the end gives the sauce a more liquid consistency.