This white pesto is creamy and cheesy and nutty, and though inexpensive to make, it feels rather luxurious nonetheless. Be careful not to overprocess this; it should have some texture like a traditional pesto. This recipe makes more pesto than you’ll probably use for a box of pasta, but it keeps for up to 2 days, covered, in your refrigerator. And, like the other takes on pesto in this book ( this is delicious on toast, as a dip, or in any number of the dishes in which you’d use a traditional pesto.