Please accept my humble obeisance. All glories to Srila Prabhupada
What is prasadam?
The word `prasad' means that which gives peace. Prasada is the sacred food offering of the Lord. The prasadam of the Lord is very purifying. If it is taken with faith and devotion, it brings miraculous results to the person who honors it. The Lord enjoys the subtle essence of the food offered to Him with love. The food is then honored as prasadam.