Our daughters are adopted. They were born at 2 & 3 lbs, 9 weeks premature. One was then severely shaken by her bio mom right after discharge from the NICU. Sensory issues are common in premature children, and intensified from the brain injury at such a tiny size.
I've researched it a LOT! I've no idea why chicken nuggets and mac & cheese seem to be favorites, but kids differ on what type/brand of nuggets and/or mac they will eat. I know with my daughters texture is the major issue. One of my daughters will touch something to the tip of her tongue and say "no" and won't eat it. The daughter that was shaken refused to eat as her only way of exerting control in her life - she was given so many meds orally each day that she hated people putting anything into her mouth. She is now on a feeding tube for most of her calories, but still "samples" and eat about 8-10 ounces of table food per day. If we can get her to eat more than about 5 bites at a meal we celebrate!
Many people beleive it is a parenting issue, and that if the child is hungry enough they will eat. Nope! With most sensory issues the child is truly hungry but can't tolerate the texture of the food and it only frustrates them that they are not being given food they can eat. Sort of like if you try to give a newborn a piece of steak. Their brains just can't process what to do with the texture of the food, it is not a willful defiance as some people would like to believe.
As for how you deal with it - we feed her before we go out to eat and order something she will tolerate at restaurants, or we leave the girls with a babysitter. On trips, we bring food. When we cruised last May with our twins, we learned they won't eat melon. The fruit they love most is berries and mandarin oranges, or applesauce. So, this trip we are bringing applesauce pouches.
My daughter likes hamburger, but only from In&Out, and she can tell the difference if we try to give her something from somewhere else. She loves cut up pears but can't tolerate biting into a slice of pear. I remember the first time she ate mac and cheese in a restaurant we called the chef out to ask for his recipe so that we could make it at home as it was the first time we'd been able to get her to eat mac and cheese. Wouldn't you know, it was Nestle' prepackaged something for the restaurant chain.