In very large saucepan, melt butter and cook ham and chorizo for 10 minutes. stir in tomato sauce and cooked pasta. simmer for 5 minutes. in buttered baking dish place a layer of pasta mixture, sprinkle with cheese, another layer and cheese ending with a cheese layer. fleck with butter and cook uncovered in a 350 degree oven for 10 minutes or until brown and bubbling.