1. Pick through and wash the lentils.
2. Place lentils, water, onion, garlic, ginger, chilis and salt in the slow cooker. Stir well and set to cook on high for 2 1/2 hours.
3. When the lentils are cooked, add the lemon juice and stir. Adjust the lemon juice to taste.
4. Add the milk and stir.
5. Serve warm with fresh pita bread or brown rice.