Add the drained chickpeas, tahini, lemon juice, minced garlic, cumin, and salt to a food processor.
Process until smooth and creamy, scraping down the sides as needed.
With the food processor running, slowly drizzle in the olive oil and then the water, one tablespoon at a time, until the hummus reaches your desired consistency.
Taste and adjust seasoning if necessary, adding more salt, lemon juice, or cumin.
Transfer the hummus to a serving bowl. Drizzle with a bit more olive oil and serve with pita bread, vegetables, or as desired.
Notes
For an even smoother hummus, you can remove the skins from the chickpeas before processing, though it's optional.