An easy summer sauce, this lemon pesto is made with three whole lemons, plus garlic, pine nuts, and Parmigiano-Reggiano. You can make it ahead and serve it as a dip for crudité, toss it with pasta, or drizzle over roasted vegetables.
Prep the lemons. Wash the lemons thoroughly. Halve and juice one lemon, then trim off the bumpy ends of the remaining two. Cut the lemons in half the long way, then slice each half into quarters. Remove the seeds and use a sharp knife to trim the thick, white fibrous core from each segment.
Puree the lemons. In a high-powered blender, add the diced lemons, lemon juice, pine nuts, garlic, Parmigiano-Reggiano, salt, and pepper and blend on medium speed until the lemons have broken down and begin to look smooth, 30 seconds to 1 minute.
Add the olive oil. With the blender running on low speed, slowly stream in the olive oil until the mixture is smooth and creamy. Increase the speed and blend for an additional 30 seconds.
Serve or store. Use immediately or store in an airtight container in the refrigerator for up to 3 days.
Notes
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Blender Note: We tested this recipe using a high-powered blender. If you’re working with a blender with less horsepower, it may help to chop your lemons even more finely by hand before adding them to the blender with the other ingredients.