The food sticks to his false teeth

My husband has a partial plate - his uppers, and before he could take the food that stuck to his teeth out, but now that he cannot use his hands because of him having Lou Gehrig's disease, he will use a plastic fork that he wants me to hold while he moves his mouth around to dislodge whatever it is. I do not mind rinsing his dentures, but holding the fork for a very fussy guy is rather annoying. Now he loves white bread and does not like the healthy stuff and I do cook a lot of pasta and rice that does not stick as much. But what I want to know is a list of food that will not stick to the pink part of false teeth. It may seem silly but it does bug me.