It is perfect! i personaly would add some bumpness and roughness to the burger at first, but my opinion.
Have u used an hdri for lighting? It realy helps.It is a very nice render but i think the light is not right
I find the salade too dark and not interacting with the light enough. Try to add a bit of SSS or translucence, same for the tomato.
The cheese looks ok, but a bit of SSS would make it better 
Smooth the plate by increasing geo, we can see sharp corner without zooming.
Now, i’m hungry, thanks a lot…
Edit: i think you can add some noise for the roughness of the salade to make it “sweat”
Looking good waaay too much cheese for such a small patty though.
I have tried HDRI soon I will post it After I make some changes in it … 
Yes, You are right I will make amendment To it Thank you So much .
I like cheese alot thats the reason 
Tomato, lettuce and fries look dried out. Perhaps they need more glossiness?
Ok I will do it . Thank you