sandwich i prepared

Nowadays i prepared some sandwiches for my recess time meal.Newly, i chose a cheese which contain black pepper.It was tasty.The ingredient in mt sandwich was simple.I put a piece of cheese on a bread then put on the chicken floss on the cheese and then cover with another bread.The sandwich is done and ready to eat.But i bring it to school.Sorry to any of my islam reader.It was non-halal.