For as long as I can remember, my mother has made a so-called "green ketchup" which until very recently I thought was "relish" (it's not, obviously) but rather green-tomato based. It's SO good on everything, including Shepard's pie.

Actually Shepard's pie is ONLY good with green ketchup.

I have no idea what the recipe is but it's probably something like onions and green tomatoes. I could ask if you want.