THE FIRST TIME I MADE THESE: I left out the onion soup mix and egg and they were AWESOME! I'm a huge fan of flat, flat burgers. hate, hate meatball burgers. well, these were super flat and very tasty. my 3 kids ate them and never said a word about the hot sauce. it wasn't spicy like hot sauce, it just made for a very tasty burger. also very moist. i will make these often. will probably add some extra garlic salt since we are very fond of garlic. we even garlic salt our french fries. yummy. thanks.
THE SECOND TIME I MADE THESE: i used the onion soup mix and egg. they were still moist and flat, but they tasted waaaay too much like meatloaf. no one liked them.