1. Heat a skillet with enough oil to cover bottom of pan over medium-low heat, add onion and pepper, saute until tender. Add garlic, saute until fragrant; add tomato and Italian seasoning, saute 3-4 minutes. Set aside to cool.
2. Preheat oven to 400 degrees F. In a large bowl whisk together egg, 1/3 cup tomato sauce and Worcestershire. Add ground meat, bread crumbs, black pepper, Parmesan and sauteed vegetables. Combine with a fork; mix in 1 cup of mozzarella.
3. In a large, greased roasting pan form the meat into a loaf. Spread the remaining 1/2 cup sauce over top and sprinkle with remaining 1/2 cup mozzarella. Bake about 45 minutes or until no longer pink in the middle. Let set five minutes before serving.
Serves 4 to 5