What dua to read so as to be protected against jaadoo (sorcellerie) done through food?

Read:
A’ouzou bi kalimaatillaa hit taam mati min sharri maa khalaq three times.
Bismillah hillazi laa yadwourrou ma’asmihi shai oun fil ardwi wa laa fis samaai wa houwas sam’ee oun ‘aleem three time.
Ayatul Kursi.
And the last three surahs three times and then blow.