I have a greedy friend !!! any advice?

So in have this friend who i love to death me & my friend are super close but whenever she comes over my house she eats ALL MY FOOD. like i dont want to be mean and say anything cause she my friend but at the same time i want to cause i think it's getting kinda annoying how every 5 minutes literally she complains about she's hungry. like one night my mom went out and brought us chinese and after she ate chinese she wanted to ask my mom to fix another meal. i just dont know how to tell her to stop being so greedy and whenever i cant finnish my food she eats it right off of my plate without her maybe wonderin if i wanted to save it for later for myself. she's also a picky eater i just dont know how to tell her to have some manners when you go to other peoples house always gtalkin about she's hungry askin me to tell my mom to fix another meal does anyone have any advice?