How to make a facsimile of corned beef from (plant-based) ground?

I became vegetarian about a year ago, and one thing I still crave constantly is corned beef hash. I’ve found that impossible meat has been a fairly good substitute for when I really crave a dish with beef in it, and I just cook it like I would have cooked real ground beef – but I’m flummoxed about how to replicated corned beef.

In my (limited) experience, corned beef is made by marinating an entire brisket, then slow cooking it. But of course I only have a vegetarian substitution for ground beef, not for a big slab (as far as I know, no brand of fake meat does pieces that could be marinated). I’ve never heard of marinating ground beef, and worry that trying to copy this directly wouldn’t be a good idea.

Does anyone have any ideas about how to impart corned beef seasonings/spices into a (plant-based) ground beef dish?