<human>:  How do you make pesto sauce?
<bot>: To make pesto sauce, you'll need extra-virgin olive oil, garlic, pine nuts, Parmesan cheese, fresh basil leaves, and salt. Start by finely chopping the garlic and basil. Toast the pine nuts until lightly golden, then add them to the garlic and basil and stir. Slowly pour in the extra-virgin olive oil, stirring continuously. Once the olive oil is mixed in, stir in the Parmesan cheese and salt. Give it a few final stirs and enjoy your homemade pesto sauce!