In small bowl combine oil, vinegar and oregano; set aside. Cut bread in half lengthwise and arrange lettuce, tomato and Onion slices over bottom half. Drizzle oil and vinegar mixture over vegetables. Evenly distribute sliced Turkey pastrami, Ham, breast and salami over vegetables. Top with Cheese slices. Cover with remaining bread half. To serve, cut hoagie, on the diagonal, into 8 slices.