Could it be a saucy summer?

So I have a load of tomatoes now, all of them grown from some Sutton's 100s and 1000s seeds. Given the number of times the basket has fallen off the windowsill, I'm amazed it's still happily living up to it's name, giving me more fruits than I can possibly eat. This leaves me with a new problem - what to do with them. I already started using them with some Tuna before, but now there's so many, I'm thinking I might make some ketchup. All I need is a recipe....