もうすぐパスオーバー。モーゼの出エジプトに由来する行事。そこでこんな記事を読む。 According to the kosher rules during Passover, matzo dough must not sit out for longer than 18 minutes before being cooked. After 18 minutes, it is said that the dough will begin to ferment and thus leaven, making the …