Du'a for blessings in food

اللَّهُمَّ بَارِكْ لَنَا فِيمَا رَزَقْتَنَا وَقِنَا عَذَابَ النَّارِ، بِسْمِ اللهِ

Allahumma barik lana fima razaqtana wa qina 'adhaban-nar, bismillah

O Allah, bless the food You provided us and save us from the punishment of the fire. In the Name of Allah.

Sunan Ibn Mājah 3289