It's lunch time, you joined a table with people, you are about to start eating, but just a moment before you do so, you want to wish everyone a good lunch.
If they were French you would say:
If they were Russian you would say:
And for Israelis it's:
But when I asked my friend how would he say it in English, he shook his head.
Help me out, how to wish a good lunch in English?