I joined this community to answer your question years later, although I am sure I will have many great discussions here.
I accidentally discovered vegan corned beef hash. Here is what you do:
-Buy fake ground beef. I have used Boca gound meat and Yves ground meat.
-Take 8 oz of the meat and puree it with as much or as little oil as you like. You should try to make it into a paste almost. This step isn't necessary and you can just put the meat right in without blending, but it does give it the right consistency.
-Cube 1-2 potatoes. I just end up dicing them into small squares.
-put 1 tablespoon of oil in a frying pan. Put the potatoes in first. Cook them for a while. They should stick together in flat groups when you try to flip them. Season them with garlic salt.
-Once the potatoes have been browned on one side and generously cooked on the other, add the meat paste to a separate section of the pan and cook for about a minute and then flip it.
-Combine the meat paste and the potatoes and completely brown them together. The more you brown the stuff, the more like hash it tastes.
-Dice some onion and put that in as well.
-Once the onion is cooked and both sides of the hash are nice and dark, take it out and eat. We put ketchup on ours.
It's spooky how close this stuff comes to hash. Remember the garlic salt! That adds a lot to it.