How much can there really be to know about a sauce that only has seven ingredients and doesn’t need cooking or require any specialist equipment?

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

We’re going to keep expanding our blog until we have left no stone unturned (but don’t see that happening any time soon).