Place a large pot over high heat with 4 cups of water. When the water comes to a boil, add the lentils, turn down to a simmer and cook for about 5 minutes. Drain the lentils, rinse and set aside.

Place the pot back over medium high heat and coat with olive oil. Add the onion and carrots. Cook for about a minute until soft, then add the garlic and cook for another minute. Add the bay leaf and the lentils and cook for about 30 seconds, stirring to coat with the oil. Add the broth and the tomatoes and season with salt and pepper. Bring heat down to a medium, cover and cook until lentils are tender, about 25 minutes.

Transfer 2 cups of the soup to blender and purée until smooth. Return the purée back to the pot and mix to combine.

When the soup is ready to be served add the ready cooked beef potjie stew and the cooked diced sweet potatoes and enjoy