I usually progress quickly to pudding, mum always eats that as she likes sweet things these days, and i reckon one missed meal doesn't matter all that much. It's frustrating when you have taken the trouble to get something in that you know she likes but don't take it to heart, she will probably like it again tomorrow!
If its something I can quickly 'fix' then I fix it i.e. she says there is no sugar in her cup of tea than I will put some more in but if she says she hates a meal I will take it away and we keep eating our meal. She looks horrified. But when I have left it in front of her she pushes it so far that nearly ends up on the floor
I have tried cooking another meal for her but that ended up in the bin
I reckon that if she were hungry she would eat it.