Learn how to make delicious (and easy) Pesto Spaghetti that stays bright green without any fuss. It's a flavorful and fast vegetarian meal packed with protein and fiber.
Cook spaghetti according to package directions. Drain.
While the spaghetti cooks, add the ingredients to a blender or food processor. (A blender will make a finer puree, though you can use either.)
Blend very well until very smooth, stopping to scrape down the sides of the bowl or using the stick that came with the blender as needed.
Season to taste with salt if needed.
Toss with the spaghetti and serve warm with additional Parmesan cheese, if desired.
Notes
Store pesto or leftover spaghetti in an airtight container in the fridge for up to 3 days—cover the top of the pesto with olive oil to keep it protected from air. Or you can put it into a zip-top freezer bag, with as much air removed as possible, or freezer tray for up to 3 months. Thaw in the fridge or at room temperature to use.
Use a blender or food processor depending on what you have and what you prefer to use. Stop and start, scraping down the sides, as needed to get it to blend smoothly.
Taste and add a little more salt if needed.
Add a touch of lemon juice to keep the pesto brighter green and to add flavor.