Can I tell her that I don't care for her world famous alfredo
Seems a bit harsh but why don't you care for her alfredo?
I want her to learn that she can't just buy me with food because I'm an artist
I understand, but it's polite to at least try and praise the food someone has cooked for you. That would really hurt her.
She's just trying to impress me and I prefer artistic endeavors over physical ones.
Why wouldn't you accept free food? If it was me, I wouldn't care if she was doing it to gain something. We artists need all the help we can get, because imagine all the time wasted on making dinner when we could have been using it to make art.