Have you tried making things that are new and interesting, maybe she's bored with her food? Or maybe you could try making something that looks like junkfood but is actually quite healthy??

All kids at many stages go through pickiness, and she won't starve so don't worry about that, she will eat if she's hungry enough. Maybe you could try giving her options like say "Well you can either eat your dinner or you can clean your room/feed the pet/pick up all your toys etc"? Not sure if they will work but might be worth a try?