Chop the red onion and the carrot, grate the ginger, and mince the garlic.
In a large pot, heat up 2 tbsp of olive oil and add the onion. Fry for a couple of minutes until it softens. Add the garlic and ginger and fry for 30 seconds. Now add the Thai red curry and the tomato pastes and fry for 30 seconds more.
Add the (washed) red lentils, carrot, chopped tomatoes and the vegetable stock. Simmer until the lentils are soft (around 15 minutes).
Add the coconut milk and light soy sauce and blend the soup. Adjust the seasoning if needed. Done! Serve and garnish with fresh parsley and yoghurt.