Listening to the radio this morning, the Sikh (at least notionally) presenter interviewing a Muslim observed, "Islam is a wide church" (he did then say, if you'll pardon the expression).
I guess it's no different to us as Christians referring to that we perceive as 'sound' or 'authentic' as 'kosher'
What other mixed-faith metaphors are out there?
Changing tack slightly...
A friend of mine was recently at a high level interfaith meeting that was exploring issues around food labelling and food that can be eaten by people of any or at least most faiths. This has arisen partly because, for example, ceremonially unclean parts of of kosher or halal slaughtered animals enter the generic food chain, and this is, at least theoretically, offensive to some Christians (I'd argue those who don't quite understand what St Paul said, but even so).
Then of course comes the question of what you can, or can't serve as a meal at a theoretical or literal interfaith gathering that absolutely anyone could eat - not easy since dietary laws are as complex as people! I vaguely recall hearing something about the meetings in Israel/Palestine involving people of the three Abramic faith where they opted for vegetarian food because everyone could eat it without fear. And I recall my own discomfort attending an ecumenical event in Manchester to which interfaith guests had been invited at which wine was served... fine for me, as a by choice TT Christian, just to say 'no thanks', but flippin' insulting to the Muslim guests I thought.
Anyway, among the universally acceptable options would probably be....
water, fruit juice, (tea and coffee would not be acceptable to those who exclude caffeine)
rice, oats, maize, potatoes, flat bread
fruit, vegetables, nuts (not mushrooms since some faiths don't permit them)
Ironically you end up with pretty much what the Bible tells us Daniel and his mates ate... and they seemed to thrive on it!
And now for the other extreme - two odd fusion dishes I've come accross recently in Glasgow...
- the haggis pakora
- the black pudding pizza
Each of which sound decidedly dodgy!
Edit - comments acting up again. This from Julie...
Sadly not even that simple - some fruits and veg are forbidden by some faiths:root vegetables, figs, and honey amongst the forbidden foods, foods with e-numbers (the list is pages long!)
Eggs are forbidden as well and some forbid dairy produce.
Utensils and work surfaces need to be separate for some.
The advice to NHS hospitals runs to 60 pages!
Also some object on ethical grounds and Sikhs (and therefore I guess the Christians you mention) aren't sure about whether kosher meat (which is not prayed over at the time of death only at the time of eating) is ritually slaughtered meat or not!
Some also object to being only offered vegetarian food on the grounds that others' beliefs should not be forced upon them!