Drain and rinse the chickpeas thoroughly. Reserve a little of the chickpea liquid if desired, then add the tahini, lemon juice, garlic, cumin, and salt to a food processor and blend for 30-60 seconds until smooth.

Add the drained chickpeas and olive oil to the food processor. Process for 1-2 minutes, scraping down the bowl once or twice so the mixture becomes evenly blended.

Add ice-cold water one tablespoon at a time while processing. Stop when the hummus is light, creamy, and spreadable, using only as much water as needed.

Taste the hummus and adjust the salt, lemon juice, garlic, or cumin to suit your preference. Transfer it to a serving bowl, make a shallow swirl on top, and finish with olive oil and optional paprika, parsley, or whole chickpeas.