Heat 1 teaspoon of oil and fry the paprika, turmeric and chilli. Add vegetables and lentils and stir and coat vegetables with spices. Cook for about 5 minutes.
Add the tomato juice, vegetable stock, thyme and bay leaf to the vegetables. Bring to the boil and simmer for 40 minutes or until the lentils are cooked.
Add salt and pepper to taste. Add more water or stock if necessary for a good consistency.