You must mean Manwich. I used that quite a bit, tried some from scratch within the last year but they were "off".
The best ones I ever made were for a group gathering. Somebody gave me fresh beef from the whole cow and told me to put some tomato soup, sauce, paste, onions, water, salt can't remember what else. Wasn't into garlicky spicy stuff in those days.
Cooked it in the oven in my big oval turkey roaster, was a great help. Always helps when people are hungry though.
The flavors blend overnight and sometimes they are better the next day. Chef John had some stuff in his I don't care for so I will wing it next time.
My favorite ones were from A&W years ago and some others from the little stand at the 9th hole on the golf course. Were we starved by then! We had to bike, carry our own clubs and walk it. Fueled up and went for 18 if we had time.
I think ours may not have been tomato-y enough.
-JT
I have a sloppy Joe recipe that turns out a lot like manwich. it’s a lit of work (chopping things) for not being any better than a can. but I suppose it is cheaper.