Steve,
The bulk of the food is in focus which is what's important.

If you still want to do something about the focus, try standing back a little and later cropping the picture. Be sure you use a high enough pixel setting to ensure adequate resolution.
Here is more detail about improving focus of closeups. Warning: If you're bored by technical crap, stop reading now.
"Depth of field" is the zone of sharpest focus. It's controlled by adjusting the lens aperture or size of lens opening. A narrow aperture such as f8 or f16 means a greater depth of field. A wide aperture such as f1.4 or f2 gives a narrower depth of field.
To adjust this you'll need to use what some cameras call "aperture priority mode." This means you set the aperture and the camera automatically sets shutter speed.
The downside is that as the aperture narrows, lens speed decreases to allow enough light in. If your hand's a little shaky the picture could get blurry.

You may need to rest the camera on a steady object. Note: If the flash is set to fire automatically, the lens speed won't go below a certain level (probably 1/30 of a second).
You'll have to check the camera's manual to see if it has an aperture priority mode.
An easier method is to stand back a few feet when taking the picture. Depth of field increases with shooting distance. You'll have to crop the picture, so use a higher pixel setting to avoid losing resolution.
About now you're saying, how about if I stand back and use the telephoto zoom? The problem is that zooming increases focal length, which reduces depth of field! Sounds like a dirty trick, but that's how optics work.
It would take some experimenting to see if standing back and using the telephoto improves focus. I don't know of any absolute formula; it depends on your particular camera / lens and the settings.
By the way, don't bother with the digital zoom --that's just an electronic trick which will reduce resolution. Only use the lens zoom.
Good luck!
Where there’s smoke, there may be salmon.