In a food processor, combine the chickpeas, tahini, nutritional yeast, garlic, sea salt, black pepper, lemon juice, and 2 tablespoons of the water, and puree until smooth, adding 1–2 tablespoons water to thin as desired. Stop to scrape down the sides of the bowl a few times, and continue pureeing until very smooth. Season to taste with additional salt, black pepper, and/or lemon juice, and serve.