oh boy, how do you phrase this...

Her cooking is actually so bad.

Like, so bad that it should be censored. So bad, even the Dubious Food from breath of the wild looks better than it.

Probably tastes better too...

You have many an internal monologue as you struggle to even chew on the portion of food in your mouth, each bite revealing another stingy aftertaste.

she stands to the side, holding her hands together in front of her, that usual vacant smile across her face.

"So master, do you like it? I tried my hardest on this one!~"

She said, smiling and leaning over to look at you. If only she knew the internal struggle of eating this human torture device...

I mean, you're her most frequent maid hire, so you guys are on a personal level, but how do you say "this is shit, stop cooking" without being rude..?