Here´s another ingredient then.
Kidneys.
I thought that but then I thought why not?
The thing is that salads don't have to be cold - so sliced warm cooked kidneys over a bed of salad leaves with a vinaigrette would work for me. Obviously some people don't like kidneys but that isn't the point here. I'll see if I can find an example or make it myself as I happen to love kidneys.