Are you taking small to normal size bites of food and chewing at least 20 times before swallowing? If not, give it a try, food needs to be chewed to mush before going down the hatch!
Is the food on the dry side? If so, you may not be producing enough saliva to make food moist enough to swallow. If this is the case, drink along with eating.
A spastic esophagus could be the problem. If so, have a hot drink along with food. Heat will help relax esophagus.