In a large skillet, saute mushrooms, green pepper and onion in oil until tender. Add spinach; cook for 2 minutes. Add soup, sour cream, paprika, salt and pepper; heat through. Spread in the bottom of a greased 13-in. x 9-in. baking dish. Arrange chicken on top. Bake, uncovered, at 350° for 50-60 minutes. Sprinkle with bacon and return to the oven for 5 minutes. Serve over noodles if desired.