Cut bread loaf or rolls in halves, lengthwise. Spread with butter.
Combine beef, Parmesan cheese, seasonings, onion, tomato paste, and olives. Spread mixture on cut sides of bread loaf or rolls.
Place unwrapped loaves or servings, meat side up, on cookie sheet. Top with tomato slices.
Bake in moderate oven (350°) for 20 minutes. Remove from oven; top with cheese slices. Return to oven until cheese is melted, about 5 minutes.
Yield: 8 to 10 servings.