My DH went through a period of poor digestive health a few years back which vastly improved once he went off gluten. It has settled down a fair bit now so he can have small amounts of gluten but it gets worse during periods of high work stress. Now, while he can eat a bit of gluten, he still avoids beer, wheat pasta, pizza and (mostly) bread.
One of the challenges was finding food he could eat but also worked for the rest of the family. He ate more baked potatoes as they are filling, quick in the microwave, and can be served with a variety of toppings which can make them very tasty. He also ate porridge made with rolled oats (oats are gluten-free but main issue is whether there is any cross-contamination with gluten-containing grains). Some family dinner staples were: panfried salmon with teriyaki sauce (yeri yeri brand is very good and has a gluten free option) served with quinoa and veg; honey mustard chicken served with a non-gluten side and veg (
www.realgoodfish.com/recipe/956/oven-baked-honey-mustard-chicken-thighs), various salads like potato salad and coleslaw. I made a tonne of Asian dishes like stir fries and noodle dishes (with rice noodles).
Crustfree quiches were good - you can make individual ones in muffin tins or cut a larger one into squares and store in fridge. There are good examples on the site I mention below.
I really like this food blogger and use a tonne of her recipes. There is a good gluten-free search function on her site.
https://www.recipetineats.com/category/dietary/gluten-free-recipes/?fwp_paged=4