Ah, that's sad for you. But also a very proud time now that's she's eating 'big-girl' foods! It's really wonderful too that she ended things on her terms (and she's still getting bm on her cereal anyway, right?), though perhaps a mutually acceptable compromise might have been nicer.
Yep, she won't overeat, so just keep feeding her till she doesn't want it any more. I think they often up the food intake around that age too.
All the best