I really need to do something about DS's diet. He eats only a handful of things - all the same texture (crispy /crunchy) and all carbohydrates. We recently found out that he has various vitamin deficiencies 
Just today I tried the methods recommended in this thread:
www.mumsnet.com/Talk/special_needs/1718040-Food-Selectivity-Action-Plan
It didn't go very well at all. He refused to eat even the two foods he normally does eat and he got more and more cross as I kept putting the food in front of him.
He did touch the food (to feed it to me
). But my target food was dry cornflakes - something he used to eat until about a year ago and is also the right texture, so wasn't a very challenging choice at all.
Has anyone else had success with this? I'm going to try again, but feeling disheartened that he wouldn't even eat the favoured foods.