Soak the lentils, covered in water with 2 tablespoon lemon juice overnight.
In the morning, drain lentils.
To the lentils add broth, onion, carrots and garlic.
Bring to a boil, reduce heat and simmer until tender about 40 min.
Allow to cool slightly and working in batches, puree ½ to ⅔ of the mixture. Pour back into the soup pot.
Add 3 teaspoon lemon juice, cumin and parsley to the soup mixture.
Simmer 5 - 10 minutes before serving.
Top with sour cream and grated cheese if desired.
How To Prepare Lentil To Make Lentil Soup
Here is one problem, however. Lentils are high in phytates. Phytates or phytic acid is an anti-nutrient found in all grains and legumes which must be neutralized before your body can absorb the nutrients from foods eaten.
The phytates in lentils can be easily neutralized by soaking them overnight in water with a couple of tablespoons of lemon juice, vinegar or whey. For more information, read Grain Preparation.