Three Onions on Chopping Block

This is for Rookie Painter Sept 2011 challenge, Three Onions. It's oil on 10x12 canvas panel.

I thought the original reference photo was fine, so I didn't alter too much from the original. (ref) I kept the color mostly in the same family. For the onions, they were mainly cadmium orange, burnt sienna, mars yellow, cadmium yellow, raw sienna, raw umber, ultramarine violet, cadmium red, coral, and white. Chopping block was white plus raw sienna, plus all the left over colors from the onions, while the background is Gamblin's radiant violet plus white.