My son worked at Papa John briefly, and they let him make a pizza to bring home at the end of his shift; he tried every conceivable idea -- light cheese, different cheese, no meat, with meat, and none of it did any good -- he's a good son, and knows how I love pizza! But neither of us ever even considered that it might be the tomatoes. But after the spaghetti incident, it was inescapable!
And actually, on the ketchup... it might depend on how much. Because I made a meatloaf this week, and I've been having a few minor issues -- nothing really bad, just not feeling my best, tummy-wise; I might have been a little too heavy-handed with the ketchup on top. Hopefully it's settled down now.
Andria