What can I plant now in a 36 x 24 x 10″ wooden box?

Haus Monkey - August 11, 2020

I recently moved into a new house and the previous owners left a 36 x 24 x 10″ wooden raised box in the backyard. So I want to know if it’s worth it for me to keep it and plant something edible in it, or not. 

I don’t care much about what I plant. That is, I’m thinking about stuff I can eat – not flowers. I’m fine even if it’s just herbs.

FYI the box faces South. The soil in it was already there so I have no clue if I need to do something with it or not. I’m a total newbie, in case that wasn’t clear! Thanks!