Help please. Herb, Vegetable or a weed?

[Txmmy3]

I made my first attempt at a garden last year, between my inexperience, help mowing and a new dog it failed.
This year I planted some new plants, some came back and there are some weeds...
I cannot find what this plant is anywhere.
Thanks in advance for any help.

 

[oneeye]

If you didn't plant it pull it.