In a large pot, heat oil over medium flame. Add onions and sauté for 10 minutes.

Tie chicken in a mesh soup bag; place in pot. Add all remaining ingredients.

Bring to a boil. Reduce flame to low, cover and simmer for 90 minutes.

Remove bag of chicken. Discard skin and bones, shred chicken, and return to the pot.

Give soup a stir before serving since the lentils tend to settle on the bottom.