Help with Celiac's disease

Cross-contamination can be a huge issue. Preparing food that may come into contact with wooden or plastic items (cutting boards, colanders) that might have gluten residue in cracks can be an issue for severe celiac cases.

My SIL's celiac isn't so bad that her parents wash everything and worry about butter being used for toast. 

When I've had her to my house, I've been careful to not cross contaminate, but she doesn't do that at her house or at her parents--she and her husband eat with her parents almost every night. 

My SIL's favourite dessert is cheesecake. I make Ina Garten's cheesecake recipe and top it with cherry sauce or caramel sauce and chocolate sauce. 

For the crust, I use almond meal cup for cup for the graham cracker crumbs. My SIL loves that because she was missing the crust on cheesecake, and she couldn't believe how delicious the almond meal crust was. She thought that I had bought special gluten free graham crackers. 

When I cook for her, I do a lot of grilled foods. Roast chicken is also a favourite.

That's so nice that you are making sure to have food he can eat! I am gluten free (pretty sure it's celiac but I've never officially been diagnosed. Runs in my family.) and I never assume there will be stuff I can eat - and it's such a pleasant surprise when I can!

I am the only one in my household that is GF. I have my own labeled margarine and cream cheese, anything that you'd spread on toast can be cross contaminated. I saw butter mentioned above, that's a biggie. My house we mainly use butter for cooking so I feel ok using the butter but if we have guests, I will open a new stick for myself.

Don't make anything with gluten in the kitchen at the same time as anything you want to stay gluten free - flour can fly through the air. We do all our GF baking first, after wiping down the kitchen, then do gluten baking. Make sure the serving utensils are washed and don't get mixed up. My aunt went to a ton of trouble to make a gluten free pulled pork, but did have reg rolls available. Someone served pork onto a roll and then put the serving spoon back in the pork. Cross contaminated and unfortunately, the GF people got sick from it.

Grilled foods are great, rice or potatoes for a starch instead of pasta, if you want to do a gluten free baked good for dessert, there are some great boxed mixes out there. Fruit and veggies are always naturally gluten free and I enjoy potato or tortilla (check the label to be sure) chips with dip as an appetizer.

I would just cook him a chicken breast (if he will eat that), by itself in a little foil packet or liner. If you put any seasonings on it at all, make sure they are gluten free. I personally would skip the seasonings and just do salt, butter and pepper. And maybe some veggies (cooked separately, probably in another foil packet or liner) or a salad with gluten free dressing and no croutons!! I only have an adult that I have to deal with who has celiac, and I would think adults would be easier unless the kid is not picky!

Exactly. If you have Celiac you cannot have gluten, period. She may not experience symptoms but she is damaging the lining of her intestines and will pay for it one day, likely with a shortened lifespan because if your villi are damaged you cannot absorb nutrients.