1Saute onion, green pepper and mushrooms in one tablespoon of olive oil until limp. Add roast beef (I sliced into shreds) and saute for about three minutes more. Add Worcestershire sauce, garlic powder and pepper and saute two to three minutes more. Remove from heat and set aside.
2Dust work surface with flour and roll out bread dough to fit a 10 x 15 cookie sheet. Fit dough into pan and build up edges to form a crust. Brush dough with remaining two tablespoons of olive oil. Spread crushed garlic across entire surface of dough. Top with a light layer of shredded cheese then add meat/vegetable mixture, distributing evenly.
3Top with remaining cheese and sprinkle with freshly grated parmesan, if desired.
4Bake at 400 degrees for 20-25 minutes or until crust is golden and cheese is melted and gooey.