Preheat oven to 400 degrees F. Slice your French bread in half long way.
Mix shredded cooked chicken with 1/4 cup BBQ sauce. Top your bread with the remaining spread evenly. Add more BBQ sauce as needed to taste.
Top your french bread with shredded chicken, mozzarella cheese, red onion, and bake for 10-15 minutes or until your cheese has melted. Once cooked topped with cilantro.