1. Wash the lentils and cook in four times their volume of water for 20 minutes until soft.
2. Near the end of the cooking time add the Bulghur wheat and cook for 2 more minutes.
3. Turn off the heat and allow to stand for 20 minutes
4. Fry the onion in the olive oil, add the tomato paste and remove from the heat.
5. Combine all the ingredients together and allow to cool
6. Shape the mixture into walnut sized balls and serve on a bed of lettuce.