What did I plant?

I tend to empty seed packets into containers at the end of the year if they're over a few years old.  Most of the time I write down what I did, but not this time (or the only other time I posted on permies).  Can someone tell me what this plant is, please?

That looks like chickweed (Stellaria media) to me and I doubt you planted it. It pops up as a "weed" in most places that are suitable for it. However, it makes a fantastic edible fresh or cooked, so don't pull it up! If you want to compare the traits and see how to use it, check this link ... https://www.wildedible.com/chickweed.

Also, I could be wrong, but it looks like you may have some tiny carrot seedlings coming up at the base too.

Thanks.  I did add carrot seeds to this container - made a note and a marker for them but the other plant is a mystery.  Don't remember adding any other seeds but the end of the growing season was too many months ago to be sure.  It does 'look' edible.  

I think the chickweed came with your potting soil. Did you use soil from your garden or yard instead of commercial potting soil? If so, that's why it came up without being planted. Count yourself lucky! It is really good to eat as well as nutritious.

Yes, I did.  Mixed garden soil into the potting soil.  It's a beautiful plant.  Looks tasty.  :)