That stuff isn't really expensive, so buy new.
However you fix it, if there's leftover beef, make some kind of soup and freeze portions.
I live alone, and especially during the pandemic I've been making various things that I can freeze individual portions of. Fortunately, I have an extra refrigerator in the garage.
Anyway, twice so far I've beef in one form or another, and turned the leftover meat into beef with barley soup. Oh, my. Wonderful. These days I eat very little (I'm 73 years old and not terribly active) so things like this last a very long time. Shortly after the New Year I made ham (bone in, butt portion) which I ate for a couple of days. Then I made a scalloped potatoes with ham, and a large portion of ham and bean soup. I took the lazy way out with the soup and used canned beans. That made something like ten portions to freeze. I also froze hunks of the ham, one amount to be another scalloped potatoes and ham, the other to be another ham and bean soup.
Because I'm doing so much of this, making a large portion of something that I can freeze, my food costs have dropped dramatically. It helps that I live alone and I tend to prefer relatively simple meals.
I miss eating out somewhat. I used to eat out two or three times a week, and now it's maybe once every other week. The up side is that I'm saving a ton of money. Those who are in my will, will be grateful. 
Edit history
= new reply since forum marked as read