Make a great salad with beans and cheese for protein, while you are preparing the salad he can grill steak tips to add to his salad. Two happy people. I try to make him happy and me satisfied, whatever you make, add either more veggies for yourself or meat for him. It takes a little effort to make this applicable to every meal but worth it. There are many dishes that are gluten free, until you add the pasta or bread. Cook a veggie soup with rice,divide it in half, add ground beef to his. If cooking meat is not your thing let him cook and add his own. You may also want to share the planning; let him come up with a meal for both of you. If being together is important, you will find a way to make it work.