I don't mean how do I make it , as in stirring it up in a big pan and pouring it in jars.
If I already have a jar of it , how do I eat it.
I tried putting it on a cheese sandwich like pickle but it seemed too sweet.
This is the sort of thing you need forums for isn't it, because google searches are full of how to make it.
I love mango chutney! 
It's usually suggested as a side dish for Indian food, particularly curries.
With plain cheese it's lovely, not too sweet IMO so maybe an acquired taste. Or as a dip for those bags of highly cheesy tortilla chips.
Bake a small camembert cheese in the oven in its box (or foil) or microwave it and have it with the MC and some plain Kettle Chips.
Daub it on a chicken breast thickly like a marinade before putting in the oven, or on a pork chop or rib.
I found some places with suggestions:
What can I do with Mango Chutney
Mango Chutney and - ?
Lots'o Mango Chutney
I chose the Baked Potato idea and that was quite nice.
I wouldn't know a camembert cheese if I fell over one so Merry is aiming her cooking ideas a bit too high for furbies there.
Thank you for the links and I will have a baked potato every month until the Mango Chutney runs out