Rinse and soak fava beans overnight. Then drain and add enough water to cover about ½~1" above the beans and bring the mixture to a boil. Cover the pot and simmer for about 1½~2 hours or until the beans are tender. Alternately use your pressure cooker to cook the beans in fraction of the time.
Once cooked, drain them and season with salt and pepper.
Stir in the lemon juice, tahini, cumin and garlic.
Serve warm garnished with the parsley and olive oil.