Red pesto or pesto rosso is made with sun-dried tomatoes. This version of homemade basil pesto sauce is savory, rich, and versatile! See notes for alternatives to pine nuts.
Wash and dry the fresh basil leaves, removing any thick stems. Add them to the bowl of a food processor.
Add the walnuts with the basil, along with the sun-dried tomatoes, garlic cloves, lemon juice, parmesan cheese, salt, pepper, and red pepper flakes (if using). Pulse several times, or until the mixture is crumbly and somewhat uniform in size.
Once combined, run the food processor on low speed. Slowly add the olive oil through the spout. Pause to scrape the sides as needed.
Adjust flavor as needed to suit your taste preferences. Serve with your favorite recipe or transfer to an airtight container to store until needed in the refrigerator or freezer.
Notes
Option to replace the walnuts with pine nuts for a more traditional version of pesto rosso (sun-dried tomato pesto). May also use pecans or a nut or seed of your choice.