Ask HN: How do you write a resume when all you've ever done is be a founder?

While I enjoy being a founder, I've received several great potential job offers lately. Problem is, they all say "just get us a resume and we'll schedule an interview". But damn... I'm 30 years old and all I've ever done is run my own businesses as long as I've been an adult.

So my question is... how do you write a resume when all you've ever done is be a founder and done your own thing?