pre-heat oven to 350. wash mushrooms and remove stems save stems

chop stems and bacon finely

brown bacon and stems

mix bacon/stems with spinach in sauce pan over medium heat slowly add cheese and 1/4 cup of parmesan cheese

when the cheese is all melted in mixture remove from heat

place mushrooms on baking sheet stem side up and fill with mixture

top with parmesan cheese and bake for thirty to fourty five minutes or until parmesan is golden brown