Pour the tomatoes in a sieve. Collect juice. Chop the tomatoes. Peel garlic and onions and cut into fine cubes. Heat oil, add onions and garlic and fry for 1 minute while turning.
Add lentils, tomatoes, tomato juice, coconut milk and vegetable stock. Bring to the boil and simmer for about 20 minutes. Season with chilli and turmeric. Season to taste with salt and pepper. In the meantime, remove the coconut from its shell and cut it into thin strips with a peeler.
Place on a baking tray and roast in a preheated oven (electric cooker: 200 °C/ circulating air: 175 °C/ gas: level 3) for approx. 10 minutes. Turn over in between. Arrange the finished soup in bowls. Garnish with coconut chips and coriander.
Use the rest of the coconut for other purposes.