Eating onions in excessive amounts or regularly causes forgetfulness, affects the mind and changes the odor of the mouth and the taste of food. It In addition bothers those in your presence and the angels. Cooking onions dissipates these side effects of the onion. The Sunan narrated:
“The Prophet ordered those who eat onion and garlic to kill them (make them chew) by cooking.”
In addition, chewing rue leaves dissipates the odor of the onions.