At the time of lifting the table cloth

Recite:

الْحَمْدُ لِلَّهِ حَمْدَاً كَثِيرَاً طَيِّبَاً مُبَارَكَاً فِيهِ غَيْرَ مَكْفِيٍّ وَلَا مُوَدَّعٍ وَلَا مُسْتَغْنَىً عَنْهُ رَبَّنَا

"All praise belongs to Allah who is Omnipresent, Pure and full of Blessings. O Lord, we are eating thinking we cannot be without it nor independent of it, nor can we do without it".

(Bukhari)