I always thought that when raw fresh produce approached a point two to four days out from going bad that it was used by the store for the prepared meals, catering, or the salad bar. I hope that's true. Do they make the prepared meals locally in each store, or is it in a centralised kitchen somewhere and then distributed as needed?
Short answer, it depends.
Long answer:
- Discount grocers for the major chains don't generally have any equipment or staff or space for preparing veg or meat, typically everything is pre-packaged before it reaches them.
- The exception is that they have their own trays and plastic wrap which you see used to wrap old fruit/peppers etc. when they are marked for immediate sale on discount.
- There are some exceptions in larger stores where certain functions (ie. butcher) may be contracted out to a third party; but then that third party has no right to access other corporate stock or to place their product in any form on shelving or in fridges not part of their lease.
- A-line grocers or 'conventional' stores (Metro, Loblaws, Sobeys etc.) do prepare salads and some 'chopped' products like onion/carrot/celery or cut fruit you may see on offer for sale; they may also have some ability to use damaged fruit to make juices.
They generally cannot use material from meat or produce in prepared meals at all.
This has as much to do w/the fact that those departments require predictable supplies to put the same things out every day, and so order their own supplies and have their own walk-in fridges etc. as anything else.
That said, most stores don't employ chefs or restaurant managers, which means means corporate is pretty worried about idiot-proofing against someone's poor judgement into what is savable and how it must be cleaned or prepared.
FarmBoy is an exception to this, where their prepared foods department will use overstock or end-of-life product from other departments, but they still don't do it as much as you might hope.
A lot of stuff on the FarmBoy hotbar is currently made in Ottawa and trucked in every morning.
There are a few spots specifically for house-made product.
But it's not a huge amount, and again they have dedicated supplies of their own as well.
Whole Foods also used to repurpose, I'm not sure the current state of their program, as they're third-party sourcing a lot of their prepared foods these days as well.
In the end, the answer is that far too much stuff gets chucked; some gets 'saved' some of the time, depending on the store.