79 Pesto Sauce Recipes in This CookbookPesto is a sauce that originated in Genoa, the capital city of Liguria, Italy. It traditionally consists of crushed garlic, pine nuts, salt, basil, hard cheese such as Parmigiano-Reggiano or Pecorino Sardo, all blended with olive oil.To make pesto, the ingredients are added to a food processor or blender and blended together. This cookbook explores the many different variations for pesto that can be created by substituting the type of cheese, the type of nut or the type of oil used. Use these pesto sauces on chicken, toasted bread or pasta. Or, be creative and use them in your own unique recipe creations.