Chop the leek, garlic, celery, 1/3 of the carrots and the onions very finely or chop finely with the machine. Fry these ingredients in a large saucepan with oil.
Meanwhile, cut the remaining carrots and sweet potatoes into bite-sized pieces. The carrots tend to be a little thinner, as they cook the longest.
Add the curry powder, carrots and sweet potatoes to the vegetables and fry for 1 minute. Add the coconut milk and the red lentils. Now add the broth to everything. I poured it up little by little so that it didn`t get too much liquid. Let everything simmer for about 10 minutes. The curry is ready when everything is soft.