If not applesauce, how about jam? If you can scare up some of those tiny pallets / portion packets supplied in some restos or cafes you should be able to tuck them in your Liquids And Other Potentially Hazardous Goods bag.

If you can't find small packets or decant some applesauce into a smaller plastic tub then this might be useful. As a last resort, the Club Kitchen usually has a carton of Innocent smoothie on hand; fairly thick, fruity and tasty, should be able to help slide tablets down without too much aggro.