There is not much information available for anyone on this problem.
I have found nutritionists to be useless at best. They have no idea what you are going through. The only solutions I got from them is applesauce, jello, ice cream or expensive supplements.
Personally I cannot now, or ever, swallow anything such as applesauce or jello. Medical advice offers nothing more than supplements and various protein powders. A mixture of supplements and protein powders come out to an average cost of $20 per pound on the lower cost items. After cancer very few people can afford it.
Currently many caregivers are trying to feed a patient and themselves or other family members. This actually results in a lot of time and expense creating what amounts to two separate meals.
I am on a permanent liquid diet. When I say liquid, I mean liquid. If it will not go through a syringe there is nothing I can do with it.
There is a solution. Less time. No expensive supplements. Taste is not great but it is a way to have the normal family meal with very little added expense or prep time. Just put your food in a blender and add milk. By volume a 50 / 50 mix is a place to start. Some foods need less some more. Sounds terrible, sometimes looks awful but it is do-able. Meat, potatoes, vegetables everything all mixed together. I have found nothing that will not turn into a drinkable liquid with milk. Since a lot of it is milk you just have to have more meals per day. If its dry hard and crunchy you can grind to a powder in the blender mix with milk or other liquid and drink. As a snack or meal simple cereal a bannana and milk becomes a fast food thats easy to drink and tastes good. I do a lot of cereal because it is fast easy & tastes good but experience dictates that too much at one time is tough to digest.
I have spent many hours searching during the past 20 months and have found nothing on food for people with cancer in the neck.
There is a new line of liquid nutrition specifically for cancer patients. Saw it in a magazine at the cancer center. Did not bother to read or note the name, because it is aimed at cancer patients, the cost will be high.
Small blenders like magic bullet work best they have a 16 ounce cup and the blade screws onto the cup. Prep, mix and drink all from the same cup. Mine has been working fine for more than a year. Just make sure you use enough liquid to keep it running at full speed. If the mix is too thick is will burn the motor up quickly. JC Penney sells a version of this blender at about 1/2 the cost. I got one on sale at $20.