Well, we planted our first garden this year and of course took some free seedlings that weren't identified. We thought this was some kind of a cabbage, but now we're leaning towards a variety of swiss chard, though we're not sure. It tastes a bit peppery, has thick white stems with veins that run through the leaves, and is supposed to be a component of tonights supper. As you can see, it fills up one half of a split kitchen sink.
Can anyone clue us in to what it is, and confirm that its not poisonous? :)