You could adapt this old Campbell's beef stew recipe, that I posted in another thread, by using baby bella's in place of the beef.
Heat oven to 350 degrees.
Put one pound of raw beef cubes into a casserole along with a couple of carrots cut into chunks, celery cut into chunks and small onions. Top with a can of Campbell's condensed cream of tomato soup (undiluted), a bay leaf, a shot of Lea & Perrins Worcestershire sauce, salt and pepper to taste. Cover and place in the oven for approx. one hour.
You can add a couple of peeled and chopped potatoes to this, I prefer to serve it with mashed potatoes, a cabbage salad and apple crisp on a cold snowy night.
I have used venison for this with good results.