Love it -- especially the cheeky (to me) lining-up of the cut tops along the head of the page. Very calligraphic. Nice shadows ... Paynes Grey? :-) Gorgeous veining and colour gradations as always. Something that stands out in this study but which I think you probably do all the time is to tune into the different characteristics of different parts of the same plant material. Here, look at the contrast between your upper leaves -- resolute, wavy, industrious, crisp -- the yellow veined midsection transforming from one thing to another -- the sharply shadowed white whose outline emphasises its smoothness and fullness -- and the slightly bewildered roots throwing their hands into the air, probably looking for soil.
No Payne's Gray here! :-) That was W&N Neutral Tint with very light washes from Viridian to Sepia. Every night is a head scratcher as to what will be my next subject. I am spending much time in the produce section of the local market, examining each fruit and vegetable for form and color. It's off to the fridge! :-)
I not only enjoyed the onion painting, but Katharine's artistic-eyed commentary on it.Twice the pleasure from one image.
As well as being praised and entertained, I learn a great deal from her comments.