Clean, wash and cut the leek into rings. Peel and wash potatoes and carrots. Cut potatoes into pieces, cut carrots into slices. Peel and finely dice onion
Heat the oil in a pot. Sauté the onion in it. Steam potatoes, carrots and leek for about 5 minutes. Sprinkle 2-3 teaspoons of curry on top and sauté briefly. Season with salt and pepper. Add 3/4 l water and stock. Bring to the boil, cover and simmer over medium heat for about 10 minutes.
Add the lentils to the vegetables and cook everything else for about 8 minutes. If necessary, roast peanuts in a pan without fat, remove. Season the potato curry and sprinkle with peanuts