Drain the cans of broiled mushroom crowns. Hollow out and chop up enough of the pieces to make 3 tbs. In a sauce pan, combine the mushroom pieces, onion, turnip, and garlic. Add the vegetable oil and cook slowly over a low heat. Stir in the cheese spread and catsup. Stuff the slightly cooled mixture into the mushroom crowns and place on a greased cookie sheet. Sprinkle tops with the fine soft bread crumbs. Bake at 425 degrees for 6-8minutes.