One whole (not pieces) pork or beef tenderloin roast. I used 4 pounds pork. • salt and pepper to taste. Thyme would be good to in small amount. • approximately 1 package frozen chopped spinach, thawed and squeezed dry. Fresh wilted would be better. • julliened aged, smoked swiss cheese. (didn't have shredded, only sliced). • finely chopped fresh mushrooms • finely diced onions. I saute the mushrooms and onions together in a fairly dry pan until very little moisture remains. • bacon strips