Clean and wash the chard. Dice the stems and cut the leaves into strips. Peel the onions, garlic and ginger. Dice the onions, chop the garlic and ginger. Rinse the lentils in a sieve and let them drain.
Heat the butter and sweat the onions, garlic and ginger in it until translucent. Add the sesame, cumin and turmeric and fry briefly. Add the lentils, Swiss chard, coconut milk and stock. Season with salt and cook everything over medium heat for about 15 minutes.
Before serving, season the lentil and chard curry with salt and lemon juice.