Drain and rinse chickpeas with water and place in a large bowl. Fill bowl with water and rub the chickpeas between your fingers to loosen the skins.
Tilt the bowl to the side to allow the skins be skimmed off the top. Drain beans and place in a food processor with lemon juice, grated garlic, and tahini. Process until a thick, lumpy paste is formed.
Using the spout on the top of the food processor, stream ¼ C olive oil into the beans with the motor running. Process until creamy and smooth.