Because it's easier to come by when you're making dinner in a dash I also added diced tomato to mine, so diced tomato + ketchup comes pretty close to tomato sauce. You should, of course, really substitute it for tomato puree or sauce.
Haha! I know, I know...my bad. But it really does come handy as a substitute when you haven't got tomato paste/sauce. Plus when you throw in the extra tomatoes, stock and Worcestershire, it tastes like you've been slaving away making your own tomato sauce from scratch
Oh I have those bad memories too, trust me. Except mine was topped with mozzarella,and no, that didn't help either