To make pesto, you need:
salt and pepper
Put basil in the food processor. Mix.
Add garlic, pinenuts and salt and pepper. Mix.
Add olive oil. Mix.
I like eating pesto on bread, as a salad dressing, and as a pasta sauce.
According to Wikipedia, Pesto usually contains cheese. I don’t eat cheese, so I don’t put cheese in it. So perhaps this is technically not pesto, and I should call it basil sauce.