Dice the onions and put them in a saucepan with a little oil and sauté briefly. When they are translucent, add the lentils and 1 - 2 teaspoons of curry and sauté briefly. Deglaze with the vegetable stock. Add orange juice. Let the soup simmer for about 12-15 minutes while stirring. Season to taste with salt and pepper and puree. Finally stir in the cream.
Tip: pureeing gives the soup its consistency. If you still want to chew the lentils, you should use more of them, otherwise the soup will be a bit thin.