Newbie gardener needs help identifying veg

hi there, my mother in law gave us a "rogue" bag of seeds. Everything else has grown wonderfully and this beast in the pics has grown extra well, but have no idea what it is. It has yellow flowers, but rain has beaten them down today. Any help appreciated. Seems like very very fine pea pod - not sure if can eat it, but has tiny seeds, more than peas inside. Am trying to figure out whether we need to dig it out. thx

 

What did the plant look like before it started to produce flower stem?
Looks to me like some kind of Brassica.
brassica seed pods - Google Search

 

Hi Liz, thanks. I think you could be right. I checked Google and it does look like that - but I think the seeds were green inside. Had never heard of brassica - another first. I think it's definitely part of that family. Unfortunately I hadn't been paying attention to it early on, as my other half was the gardener. I have only just discovered quite like planting (and eating!) veg, thx again

 

Brassicas include cabbages, brussels sprouts, broccoli and such like. most have similar yellow flowers and these long seed pods.

 

that makes perfect sense. We had the most wonderful broccoli (now mostly eaten!) next to it"! thanks again, it has been doing my head in.