Drain and rinse the canned chickpeas well, then add them to a food processor.
Add crushed garlic, tahini, lemon juice, oregano, 2 teaspoons olive oil, salt, and black pepper to the processor.
Process until smooth, stopping to scrape down the sides with a spatula as needed; add a little water or more olive oil if the hummus is too thick.
Transfer the hummus to a serving bowl and drizzle with additional olive oil.
Top with finely chopped onions, parsley, and/or cilantro before serving.