Cooking for Autism

A friend of mine has an autistic child, his physical age is 5. He refuses to eat anything that is not perfectly circular and white.
His mother is beside herself trying to get his medication into him and get some variety in his diet. Short of having three people hold him down while someone force feeds him three times a day, there seems to be nothing she can do.
Any suggestions for perfectly round white food?
Thank you for your help.