As for colors... do you have a "color calibrated" monitor? (e.g. do you own a tool such as an X-Rite ColorMunki or a Datacolor Spyder?) If not, invest in one of those. Several years back when I started shooting digital my monitor was a bit too "cool" (colors on the monitor were bluer then they really were) and I would adjust to make my photos look correct to me. But when I shared them, that meant that other people were seeing images that were much to warm (skin tones were coming out orange.) Now I have a color calibrated monitor and that's no longer a problem. It also means when I send photos to a proper lab I don't have to be surprised when the color come back up looking nothing like I expected.
Compositionally... I prefer the lower angle to the higher "nearly top-down" view of a plate.
The reason I mentioned in a previous thread to think about what your subject is (in this case it needs to be the chicken) is because the photo should feature that item. We all know and broccoli look like. I might go a bit tighter on the chicken and leave the broccoli and rice in the background (and don't worry about cropping out half the plate / broccoli / rice -- it's not the feature.)
Since you marked your profile as "ok to edit", I did a crop on your image just to give you an idea of what I mean:
View attachment 111315
If you want to feature the chicken then..... FEATURE the chicken! (Notice in this crop that I really don't care about the broccoli and rice. We all know what broccoli and rice look like and they aren't the stars of the plate. Just a hint of them is enough. So crop away!)
Is there a sauce for that chicken? If so, sauce the plate (not the food) so that the chicken is resting in a bit of sauce. It looks like there might be a bit of a sauce under the chicken, but I can't see it.
Consider the placement of the chicken. Can you place one piece on the plate, and the other piece rotated 90º and leaning on the 1st piece? Should you cut into a piece and expose the inside? (The chicken needs to look moist -- so if the insides can help convey the sense of moist chicken instead of dry chicken then consider that possibility.) These are all thoughts you might consider. This is what a food stylist does. Think "interior decorator"... except for your plate of food and place setting instead of for your home. Speaking of place setting, I only bother to show the place setting if there's something worth showing off. Food photographers will keep an eye out for attractive vessels and utensils... of various shapes and made of various materials. That extends to table coverings, napkins, towels, of various colors, materials, textures, etc.
You are trying to convey a mood. Shooting something lemony? Maybe you should consider bright whites and yellows. Shooting comfort foods such as a thick stew with a crusty heel of flour-dusted bread? Maybe you want earthen-ware or wood to go with it. You get the idea.
Food is tricky when it's real food because the timing for the photo can make a big difference. When I shoot food, I grab a stand-in (last time my "stand-in" was a bowl of fruit) and I used that to get the table styling and lighting to my liking. Once I was happy with those shots, I removed the stand-in and replaced it with the real food (the ideal piece of the food you intend to shoot is called the "hero" and that means you might cook up several pieces of the chicken but just one or two pieces look more photogenic than the rest.) A major part of the timing is that there's this ideal moment when the food is plated and things look moist & steamy... vs. just a minute or two later when it starts to look dry and as if it's been on the plate for hours.