In a food processor fitted with the shredding disc, grate the zucchini. Scoop zucchini out of the bowl and into a clean kitchen towel or a few layered paper towels. Wrap the towel into a ball around the zucchini, hold over the sink, and squeeze with your hands to press out some of the water.
Replace the food processor's shredding disc with the standard metal blade, and return the (somewhat more dry) shredded zucchini to the bowl. Add garlic, pine nuts, Parmesan, basil, spinach, salt, and pepper. Process until smooth. With the food processor running, slowly add olive oil until the pesto reaches your desired consistency. Taste and adjust seasoning as necessary.
Last step!Please leave a review and rating letting us know how you liked the recipe. This helps my small business thrive and continue providing free recipes and high-quality content for you.
Notes
Storage: If not using right away, transfer pesto to a jar or other airtight container in the fridge for up to 1 week. Pour a thin layer of olive oil on top of the pesto before sealing the lid. This prevents oxidation and dull brown coloration.
Freezer: To keep pesto longer, transfer to a freezer-safe container and freeze for up to 3 months. Transfer to the fridge to thaw before using.