You can use a gluten free all purpose flour. I make my own choc chip cookies with it. We've been gluten free for almost 2 yrs and love it. It isn't hard if you really want to feel better. I buy udi's gluten free hamb buns and slice them for toast. Love my toast! You can buy natural peanut butter and natural strawberry and other jams. that are low sugar. Our snacks are - cheese apples bananas(tho they are higher in sugar) tomatoes popcorn I also like Van's Say Cheese crackers. they are good. If he is craving something sweet you can dust sliced apples with a little suger/cinnamon mixture. You get a bit of sugar but not that much.
I make my own homemade chicken and noodles with gluten free all purpose flour. I also use the flour to make sauces.
There are alot of recipes online for gf foods. I am planning on trying to make my own pudding.
There are tips I can pass along if you are going to do anything with flour from scratch.
If you want any more ideas just let me know Rhonda