How much can there be to know about a sauce that contains seven ingredients, doesn't need cooking, and doesn't require specialist equipment to make it?

When we started researching pesto, we thought we'd be the sauce's most knowledgeable nerds within a week. Over 18 months later, we're still learning something new every day.

We will keep expanding our blog until we have left no stone unturned (but we don't see that happening soon).