Morrisons Onion Relish - 300g

Onion relish lives in the same corner of British food as chutney and pickle: the jar that comes out at lunchtime, sits next to the cheese and gets put away a lot more slowly than it came out. Supermarket own-brand jars like this one are what most British kitchens actually have open on the go.

People in Canada go looking for it because the taste is tied to a particular lunch. A pub ploughman's. A cheese toastie at your nan's. A sausage sandwich on a Saturday. When you want that lunch again, you want that jar.

It comes in a 300g glass jar, which is a fair few sandwiches or a couple of rounds of burgers, depending on how generous you are with the spoon. Keep it as the label says once it is open. Spread it, dollop it, or stir a bit into the gravy if you are feeling brave.

Morrisons fills a long aisle of own-brand cupboard staples back in Britain, and this relish keeps good company with a strong cheddar, a pork pie and a bag of crusty rolls. Add a jar of pickle and lunch has more or less made itself.