Sari was describing the matza factory that visited her school last week with Mordechai interjecting with details he remembered from when he had the same experience last year. She described how they made the wheat into flour and she had the job of pouring in the flour and somebody else poured in the water. They made the dough and everybody got to punch it down and roll it out with a rolling pin. Then they "did another rolling pin with holes". She stopped there so I asked what happened next. She shrugged and said the man took it. Knowing that he must have put the matza into a brick oven to bake, Mordechai prompted her with, "Did the man put it into the kosel* oven?"
* Kosel or kotel, depending on your pronunciation, literally means wall. As a proper noun, it refers to the Western Wall near the Temple Mount in Jerusalem.