Like many Italian foods, pesto is a simple combination of ingredients that are local and plentiful there: olive oil, herbs, nuts, cheese, garlic. But deceptively simple. The key is balance among the flavors and especially balance in the olive oil itself. All olive oils are not created equal. We use Primo extra virgin olive oil for our pesto. Fresh and strongly fruity but with no lingering bitterness, Primo provides the harmony that makes this sauce sing.