This home-made version of Branston pickle goes brilliantly with cheese, ham, corned beef, etc. And it's really easy to make.
Branston pickle is widely available in the UK, but can be expensive / difficult / impossible to obtain in other parts of the world. But...

Ploughmans Pickle - Britains Favorite Pickle Recipe
Try making your own ploughmans pickle, otherwise known as Branstons pickle, Britains favorite pickle! Makes for a gorgeous snack or light...

Home-canned Ploughman's Pickle
A home-canned, homemade version of Branston Pickle (aka "sweet pickle"), this is a sweet brown relish with small chunks of vegetables in it.

Ploughman's pickle - Eat Well Recipe - NZ Herald
A spiced relish with sweet, spicy, savoury and sour flavours