Start by draining and rinsing the canned chickpeas. If you prefer a smoother texture, you can peel the skins off the chickpeas, although this step is optional.
In your food processor, combine the drained chickpeas, ripe avocado, garlic, olive oil, and lemon juice. Blend until the mixture is creamy and well-combined.
Add the fresh spinach, ground cumin, salt, and a sprinkle of zaatar to the food processor. Blend again until the spinach is fully incorporated, and the hummus reaches your desired consistency.
To achieve the perfect texture, gradually add cold water, one tablespoon at a time, blending after each addition. Stop when you reach a smooth and creamy consistency.
Taste your hummus and adjust the seasonings if necessary. You can add more lemon juice for brightness or more salt to enhance the flavor.
Transfer the hummus to a serving bowl, drizzle with extra olive oil, sprinkle with zaatar, and garnish with fresh coriander leaves. Serve with pita bread, fresh veggies, or spread it on your favorite sandwich.