What is this plant?

Novice2020

I found this plant growing in a pot where I originally had sewn hot cayenne pepper with no success, and then sewed sweet peppers. This plant has appeared that I can't identify in my books. I've since weeded it out but am still interested to learn what it is in case I see a return.

Pete.8

I get masses of the stuff in my veg/fruit beds.
I'm not sure what it is but I try and pull it up before flowering
For some reason Fat Hen comes to mind

Borderline

The way it is growing, I'm thinking it could be a young Lycium Barbarum, Chinese Boxthorn.

Novice2020

Pete.8 said:

I get masses of the stuff in my veg/fruit beds.
I'm not sure what it is but I try and pull it up before flowering
For some reason Fat Hen comes to mind

Thank you. I did a search on the internet and the leaves look identical to fat hen (aka lamb's quarters or goosefoot, Chenopodium album) with the minute white speckling. 

Novice2020

Borderline said:

The way it is growing, I'm thinking it could be a young Lycium Barbarum, Chinese Boxthorn.

Thank you but it has turned out to be fat hen. Definitely a weed.