I have a toxic mother like that. I just dont play into with her. Last time She fixed a meal I could not eat (knowing what I can eat). I left and went to mcdonalds and brought back a double quarter pond with cheese and no bun and put it on my plate and did not eat a single bite of her food. She had made Beef stroganoff and used my recipe knowing I could not say no to it.
There were lotsa nasty looks and comments that night. But I stayed on plan