You can tweak this pesto sauce to get it exactly how you like it, which is why I’ve given you a range of amounts for some of the ingredients. I always start out with smaller amounts of ingredients, then taste, and add until I get it just how I like it (which usually involves adding copious amounts of Parmesan!). This sauce pairs great with hot or cold pasta, is tasty spread on bread and sandwiches, and makes a great base for a variety of pizzas.