To cook the lentils, place ~1 cup uncooked lentils in a pot and cover by 1-2 inches with water. Heat pot to boiling and then reduce to simmer. Simmer for 30 minutes, or until lentils are tender.
In the bowl of a food processor combine lemon juice and tahini. Process for 30 seconds. Add in olive oil and process for another 30 seconds.
Add remaining ingredients and half of the 2 ½ c. of cooked lentils. Process for 1 minute.
Add remaining lentils and 2 T. water or reserved liquid from cooking lentils. Process for 1-2 minutes or until hummus is completely smooth.