NEED RECIPES!!!

David is struggling to gain weight.  I am struggling to come up with meals he likes.  David doesn't like much meat.  If it is something other than ground meat or a egg he will barely eat it.  He loves mashed potatoes, noodles, bread and butter, macaroni an cheese,yogurt, bananas, applesauce, and zebra cakes.  I could really use some fresh ideas.  He has dropped from 40 down to 38.  I am starting to panic a bit.  He has been sick and didn't want to eat because of his throat.  David has started eating a little bit more this week.  He also said his throat doesn't hurt anymore.  I am hoping he is going to gain some back soon.  If you have any ideas or recipes you want to share they would be appreciated.