Excellent served with a tossed salad or as a snack.
Preheat oven to 375 degrees F (190 degrees C).
In bowl, combine Mozzarella cheese, pepperoni, onion, parsley, and olive oil. Spread on cut surface of rolls. Brush tops of rolls with 1 tablespoon oil and sprinkle with Parmesan cheese.
Bake for 10 minutes in the preheated oven, until golden and heated through.
Per Serving: 350 calories; protein 13.6g; carbohydrates 17.4g; fat 25.2g; cholesterol 42mg; sodium 736.8mg.