Well I appreciate that, but since you said "steakhouse district" it sounds like you're talking about the US, so I might have a hard time getting there. I'm sure someone can make use of the info :)
Sushi doesn't last long after its made. But I don't like food waste so looked up ways to make it taste okay after it's gone stale or the avocado starts browning and getting mushy.
Cut it up with scissors and pan fry it in some oil. It's not bad. Add veggies or whatever if you want.