1Preheat oven to 400 degrees. Butter an 8" baking dish. In a skillet add olive oil, heat, add bacon, cook until crisp, do not drain, when bacon is done add spinach, cook about 5 minutes. Place a layer of potatoes in baking dish, salt and pepper, top with layer of spinach, top spinach with layer of cheddar cheese. Repeat. Pour cream all over top of casserole. Bake covered with foil for about 40 minutes or until potatoes are tender. While casserole is baking, melt margarine, add bread crumbs and parmesan to margarine, mix well. When potatoes are tender top casserole with bread crumb mixture, bake uncovered about 5 minutes longer.