Toasted Sub, Roast Beef & Cheddar Shaved slices of roast beef topped with sauteed onions, mushrooms and cheddar cheese on Italian bread. Bakery fresh taste in minutes. Taste the Difference: Made with real cheese and vegetables flash frozen at the peak of perfection to lock in nutrients and flavor. Did You Know: Stouffer's offers great taste in over 90 delicious varieties with 0 grams trans fat. Since 1866.