Oh, this is a wonderful dish -- it will definitely be in the rotation! I did make a few changes: increased the spinach to 1#, and the mushrooms to 10 0z. I used seasoned dressing cubes for the bread, softened with a little melted butter, and a blend of cheddar and monterey jack cheeses. Next time I will use gruyere. My 17 year-old vegetarian son loved it, too!