My mom used to make something we lovingly called KETCHUP STEAK
It was Round Steak, a diced onion, a few sliced potatoes, an entire bottle of ketchup, and then about 1/2 of a bottle of water. All cooked for hours, sometimes in the oven, sometimes in a covered pot. It always tasted better the 2nd day, so she made a lot and we looked forward to the leftovers more than the meal served the first day. I think the tough 'Round Steak' softened up the 2nd day after sitting in the ketchup juice overnight?
I'm making a low carb variation and switching to Chuck Roast because I like it better than Round Steak.
2.5# of chuck roast
1 bottle of (RedGold) ketchup
a few ounces of chopped mushrooms
I also swapped a can of RedGold diced tomatoes with garlic and basil for the 1/2 bottle of water that my mom used. So no ketchup water was added.
I wanted more tomatoes, the acid from the tomatoes and ketchup seems to break down the chewy chuck roast into something more tender. Mushrooms replace the potatoes, but cauliflower is also a good potato substitute.
The whole thing is in a cast iron roaster and in the oven for a few hours at 325 (F) degrees. It is covered and cooking now, and the whole house smells great. I'll take the cover off for the last 30 minutes or so.