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 onions 2[...]

1/4 lb spanish chorizo, casing removed and then chopped 1 lb large white mushroom , cleaned 2 tablespoons extra virgin olive oil 1 medium onion , chopped 1[...]