Mushroom Turnover Recipe
Here are a couple of recipes for mushroom turnovers that don't use cream cheese:
Wild-Mushroom & Steak Turnovers: http://timeinthekitchen.com/2009/09/steak-and-mushroom-turnovers-with-blueberry-port-wine-sauce/
Simple Mushroom Turnovers: http://www.marthastewart.com/recipe/m...
Not sure if this is what you're looking for.. but I've used this as a filling for puff pastry triangles-
It's basically carmelized onions mixed with sauteed chopped mushrooms. Seasonings are chopped parsley, thyme, salt and pepper.
You could also mix the carmelized onions and mushrooms in with mashed potato for a potato/mushroom filling. When I do that, I skip the herbs and add in some dijon mustard.