Snack and food ideas to support loved one with UC

Hello, I don’t personally have UC but my father in law does. I’m looking for some good snack options for him so he can enjoy. Recently it was his birthday and since he can’t have a regular cake I make him crepes with almond milk and cooked with good quality olive oil as his birthday cake. He can have white flour, apple sauces some sugar free jams etc.

I know some things trigger people differently, like I know he can sometimes have lactose free cheese or sour cream for example boiled fruits etc and some people can’t have any at all. Is there any snacks on the market that anyone likes that doesn’t trigger flare ups for you? I don’t want to overstep and ask him “so what CAN you eat” a million times over and over, but maybe if I have a narrowed down reccomended options of snacks, I can present the list to him and he can decide if those work for him. Thank you in advance for your help :)