Stuffed Mushrooms With Feta

2 tablespoons butter 5 slices bacon 1 (10 ounce) package frozen chopped spinach 12 large mushrooms 3 tablespoons butter 2 tablespoons finely chopped onion 2[...]

12 large fresh mushrooms 5 tablespoons butter, melted salt and pepper to taste 1/4 cup butter 1/2 cup chopped onions 1 tablespoon all-purpose flour 1/2 cup[...]