Alison,
Contact the people at Bauman College in Berkeley, phone 800.987.7530, website is baumancollege.org for more info..
They have a program for Natural Chef certification, and deal with preparing meals for people with food related allergies/challenges, medical release patients, etc..
Maybe then can help, or at least provide you with some good books to look at.
Let me know if this helps.
Peter
peterbro@hotmail.com