Peel the pears and cut them into large pieces (approx. 2 cm). Peel the ginger and shallot and cut into small pieces. Briefly sweat the shallot cubes in a little fat in a saucepan. Add the diced pear and ginger. Let it simmer over a medium heat for 15 minutes. Add the stock and coriander, squeeze the lemon over the pan with your fist and add the rest of the lemon. Let simmer for another 5 minutes.
Remove the lemon again. Puree the soup with a hand blender and pass through a fine-mesh sieve. Stir in the coconut milk, curry powder and turmeric. Bring the cream to the boil again and season with salt.
Serve the soup with a dash of coconut milk or cream in a deep plate and decorate with a leaf of coriander.