Not my recipe but it's old & favorite around reunions...not sure if your mushrooms works on this BUT....
1/2 stick butter
1 cup uncooked Rice
1 small can mushrooms
1 can of French Onion Soup
1 can Beef Consumme Soup
Mix tog in casserole dish & bake at 325 degree for 30-40 min or til done
I usually cut up the butter & spread it thru out