Peel and finely chop the garlic and onions. Cut the chilli lengthwise, remove seeds, wash and chop finely. Roast the coconut chips in a pan without fat, remove.
Heat the oil in a large pot. Fry the onions, garlic and chilli in it. Fry turmeric briefly. Add lentils, tomatoes, coconut milk, 600 ml water and stock. Bring to the boil, simmer for about 20 minutes.
Wash the coriander, shake dry and tear up a little. Season soup with salt and pepper. Arrange in bowls. Garnish with coconut chips and coriander.