Pesto's traditional ingredients are basil, pine nuts, and Parmesan cheese. They're crushed together with a mortar and pestle to form a luxurious no-cook sauce that's delicious on pasta, vegetables, meats, and more. The beauty of pesto is how versatile it is. If you make a batch on the weekend, you can use it as a sauce for one dinner, a spread for a sandwich the next night, and a dip for a side of veggies after that. It's simple to make with a food processor. You can mix up the ingredients to feature your favorite herb, nut, or cheese. The possibilities are endless.