Preheat over to 350°.
Mix all ingredients except the pastry dough in a medium bowl. Line the bottom of an 8x8 inch pan with pastry dough. Bake for about 45 minutes or until fluffy and set in the middle (middle will be soft). Top with mushroom sauce, enjoy while cake still warm.
Mushroom Sauce
Heat oil in heavy skillet over medium heat. Add bacon and cook until fat renders, stirring frequently, about 3 minutes. Add shallots to bacon in skillet and saute 1 minute. Add dried and fresh mushrooms and rosemary; saute 3 minutes. Add wine, stock and mushroom soaking liquid. Boil until liquid is reduced to a glaze, about 15-20 minutes.
Add milk and simmer until thick, about 10-15 minutes. Remove from heat, add butter, stir until melted. Mix in 2/3 cup Parmesan. Season with salt and pepper. Pour over polenta cake and garnish with parsley.