She might only eat plain food because she's scared of most food though. My friend with anorexia only ate plain toast and plain cereal, yet she was constantly looking at pictures of food online, researching recipes, talking about food etc.
I was shocked to find out how much she charges to tutor when she has no teaching experience or qualifications !
"Each session will be £40/hour if the payment is made via
bank transfer, or £43/hour for PayPal (to cover transaction
fees). Please note this goes towards the time not only within
the session itself, but also my time for preparation both before
and afterwards to ensure you get the most out of it. If these
sessions need to run over slightly, to avoid incompleteness,
there will be no extra charge for this. Payment will need to be
made in advance of the session and this will take place via a
bank transfer or PayPal as mentioned before, and this will be
discussed over email before the sessions begin."