Subject is in focus and very eye appealing (pun intended). The one drawback to this IMO is the composition. the center composition with falloff out at the top right and bottom left corners really don't do anything for the subject and add as a distraction instead of assisting in telling the story. Suggestion would have been to fill the entire frame with your subject and let the swirls roll the eye all around the photo, Very nice subject and thought though,
From Ode to the Onion by Pablo Neruda
"You make us cry without hurting us.
I have praised everything that exists,
but to me, onion, you are
more beautiful than a bird
of dazzling feathers,
heavenly globe, platinum goblet,
unmoving dance
of the snowy anemone
and the fragrance of the earth lives
in your crystalline nature."
As to the photo, which I do enjoy, I'm wondering if you tried a closer crop to isolate the onion? I do like the heart at the center.