Preparation
In a medium-size pot, add the lentils and enough water to cover. Add the bay leaf and onion halves, bring up to a boil, cover, and turn down to medium-low. Simmer until tender, about 15-20 minutes. Halfway through the cooking time, when the lentils have been simmering for about 8-10 minutes, add the diced potatoes to the pot. When both the lentils and potatoes are tender, drain and reserve.
While the lentils are cooking, add 1/2 cup of vegetable stock or water, baby spinach, cilantro and mint to the bowl of a food process and pulse into a paste. Turn out into a large bowl and reserve.

