Split bread lengthwise and pull out a bit of the dough to create a hollow that will accommodate the filling.
Brush both sides of each loaf with vinegar and oil. Season with pepper.
Layer salami, roast beef, and turkey on both bottom pieces of bread. Add sliced onion, tomatoes, and peppers. Create a layer of shredded lettuce, peppers, and olives.
Drizzle oil and vinegar and sprinkle oregano on top. Top with remaining piece of bread.
Skewer olives, cornichon, jalapeños, Cherry tomatoes and pickle spears on toothpicks.
Fasten sandwich sections with toothpicks about 4 inches apart and slice. Arrange sandwiches on platter.