Prepped beef mixed with other ingredients before tomorrow's stew I'm prepping for stew.

I'm cutting "beef for stew" into smaller pieces.

I put it in a Pyrex tupperware container.

Then I chop mushrooms and add them to the tupperware container on top of the raw beef.

I intend to cook all of it the next-day in a 6-hour stew. Pour straight from tupperware into crockpot.

As I prepare to chop the carrots, my husband says, "Don't mix the produce and the beef."

Is there danger? (Of cross-contamination presumably?) Even if not, is it a faux-pas? If it matters, other ingredients include cabbage, carrots, mushrooms, stock, and tomato juice

By the way, as I'm prepping, I cut the beef to my preferred size. It comes from the grocer golfball-sized. I don't like chewing that down. So I cut it down to quarter-diameter-sized or marble-sized. Is this just a matter of preference? Even if it is, what would a trained-chef prefer?

Why am I prepping so far in advance? Because I cut enough for a stew now -- so the crockpot is full &amp; running. But while I'm all messy I want to cut the rest so tomorrow I can just plop it into the crockpot. Also welcome opinions on this.
cut it they way you want, it does not matter at all, and produce and meat together woud be a mortal sin in the kitchen, but if you have a small batch, store one night, and you will cook them together anyway for hours, I dont see any problem with that either. But why wouldnt you store them separetely? If you cook your produce for six hours with the meat you wont have anything left....better to add them later..and store them sep...