I pickle, ferment and sauce a lot of things. Then I look for things that can be made in very large quantities and then preserved frozen/cooled (a lot of times just in the cellar). A lot of these things are from Asia and are great and very cheap and I'm love them for taste as well; curry's (I make 10 liters at a time; from scratch, very very cheap except my time but I like cooking), auntie dumplings (prep + freeze; just watch tv while making 100s of them) etc. Lovely food and cheaper than most things.

Same here, our freezer has lots of home made dumplings in dinner size packages.

Pancakes also work well for us, we usually put fresh chopped greens into them. We still eat the Bok Choy pancakes prepared months ago, usually when we just want a quick side for leftovers.