Mine has been a T&T dish in our family for many, many years....and it's quite different...Have never, but never had anyone who doesn't like it.
I too, don't measure, so you'd have to wing it somehow.
I package of broad egg noodles--boil to al dente and set aside
small onion, sauted
1 or 1 1/2 cans of Campbells or Heinz tomato soup(after onions are soft, add the soup to the pan and simmer just a bit.
Good slab of medium or strong cheddar cheese (yellow), grated.
Keeping some of the grated cheese aside, mix everything else together. Sprinkle left over cheese on top...(can add a bit of grated parmesan, not necessary)
Bake at 325-350 until top is brown and crunchy.
ENJOY!!!