I was busy writing whilst Mike was posting so I'm skipping his efforts. It's an even bigger question since it's hard to stop the subjective intruding. I like the top right in your original, it provides a good counterpoint to the central part.
Easiest maybe, you could just find the tone-curve adjustment panel, and drop the mid-tones. Beyond that, you've got to get into selections (of areas of the picture that you can then adjust independently). Looking at this particular image, with its limited tonal differentiation between what you want and what you don't want, all I can think of is a manual selection via mouse or tablet of the central area so that you can isolate it and then switch to work on its inverse, the periphery. There are several ways of making a selection, which is an area that you can make active or inactive. The tools are in the toolbox. For instance you can select by tone or colour, but in this case the image is too undifferentiated. You can select by shape, which could work, since you seem to have a perfect circle. Or you could select by drawing with a virtual pen (Bezier).
It's about isolating areas of the picture so that you can alter them independently. No single method, I've started with the easiest.
If I may make a comment, it's to do with the highlights (white areas). The smaller ones, the scribbles of light on the cut surface of the lemon, seem acceptable, but the bigger ones amongst the surrounding ice are questionable. The psychology is that they draw the eye through their brightness, but then there is no detail to be found, which can be unsatisfying.
Interesting stuff, but I wouldn't count on the solution being quick. The image certainly has potential. If you could revert to the raw and process to tame the highlights mentioned, it would be even better.
not my photo
