Thinly slice beef and marinate it with 1/2 cup of Kraft Zesty Italian Dressing, salt, and garlic paste. Leave it aside for 20 minutes.
Slice all the vegetables. Heat oil in a skillet, add garlic, onions, bell pepper and mushrooms. Let it fry for 2-3 minutes. Add remaining 1/2 cup of Kraft Zesty Italian Dressing, black pepper and salt. Let it fry until all the vegetables are cooked and onions are caramelized. In another pan heat oil and fry the beef mixture until it is well done.
Now cut French bread from the middle so you can fill up beef and vegetables. Place 3 cheese slices and bake is for 3-4 minutes at 375 degrees F or until the cheese has melted and the bread is toasted. Spread the beef and all the vegetable mixture, place remaining slices of cheese. Sprinkle some salt, black pepper and oregano.
Place it in a baking dish and bake it at 350 degrees F for 3-4 minutes. Before serving, cut the whole sandwich into 4 equal parts. Serve it with mashed potatoes and salad. ENJOY!!