We do bangers and mash with them, so lots of gravy and some fried onions, too. They are good in sandwiches, and I've done toad in the hole with them.
On the gravy, though, the red can original Bisto is veggie. I keep that for Adam (though I usually pimp it out with some stock, onions, etc.), and I do a pan gravy from whatever meat I'm having.