How does the author use foreshadowing in Like Water for Chocolate?

In the novel, Like Water for Chocolate, one example of foreshadowing occurs when John shares his grandmother's theory of love and life with Tita. She said that "each of us is born with a box of matches inside us but we can't strike them all by ourselves." She warns, however, that lighting the matches all at once would be fatal. This instance of foreshadowing is fulfilled at the end of the novel when Pedro's suppressed passion for Tita is finally "lit," and the intense flame is too much for him to bear.