Drain the chickpeas. Place the drained chickpeas in a food processor along with the olive oil, lemon juice, tahini, garlic, salt, and cumin.
Pulse the mixture until it is fairly smooth. If the mixture is too dry to process smoothly, add a couple tablespoons of water, extra olive oil, or liquid from the canned chickpeas.
Taste the hummus and adjust the salt, cumin, lemon, or garlic to your liking.