Top photo credit: Dave Rozek
Andy George went to great lengths to make a sandwich that is truly from "scratch". He did if for a series called "How To Make Everything" and it's pretty incredible.
He planted his own garden for the veggies, milked a cow and then made cheese from the milk, pickled cucumbers, took ocean water and made salt from it, slaughtered a chicken, collected honey and even ground flour from wheat to create his own bread. Such an agonising, expensive process really makes a person ponder the notion of where you food comes from.
Here is a great video documenting his sandwich adventure: