In a food processor, combine the tahini and lemon juice. Blend for about 1 minute, then scrape down the sides and bottom of the bowl. Process for an additional 30 seconds to ensure the tahini is thoroughly whipped and creamy.
Incorporate the olive oil, minced garlic, cumin, and 1/2 teaspoon of salt into the mixture. Blend for 30 seconds, scrape down the bowl again, and process for another 30 seconds, or until fully combined.
Add half of the chickpeas to the food processor and blend for 1 minute. Scrape the sides and bottom, then add the remaining chickpeas. Process for 1 to 2 minutes, or until the mixture is thick and mostly smooth.
Gradually add 2 to 3 tablespoons of cold water or aquafaba with the processor running, adjusting until the hummus reaches your desired consistency.
Taste and adjust seasoning as necessary. Transfer to a serving bowl, drizzle with olive oil, and garnish with a sprinkle of paprika, sumac, or Za’atar.
Store in an airtight container in the refrigerator for up to one week. For longer storage, freeze the hummus with a thin layer of olive oil on top for up to one month.