Heat the oil in a saucepan, sauté the onion cubes, ginger, curry and finely chopped chilli pepper in it for a few minutes.
Add lentils and diced paprika and sauté as well. Pour in the chicken stock and bring to the boil. Add the coconut milk and cook gently for about 45 minutes until the lentils disintegrate.
Puree the soup with the hand mixer and season with salt, pepper and lemon juice.