Here's something other than potatoes to serve along with your roast beef. This is a savory mushroom strata/bread pudding/side dish/casserole....a mushroom business. It's another oldie but goodie recipe from Peg Bracken's cookbook of 1966. You can prepare it in the morning or the day before. Love anything I can make ahead. Butter 6 slices of bread. Cut the bread into squares. Put half the bread into a buttered 8" square casserole. Slice the mushrooms. I used a little over half of a 1-lb package that I had leftover. Saute the sliced mushrooms until...