Try experimenting with different grains; brown rice, quinoa (which also has protein), millet are all delicious and cheap if you can buy in bulk at a health food store. Also beans. Starchy vegetables like sweet potatoes. There are some yummy frozen "Ice creams" made from coconut milk. Smoothies with coconut or almond milk. Vegetable fats should be fine for your GB; nuts and nut butters (I love almond butter on a brown rice cake with sliced granny smith apple), avocado sliced in a salad or mashed on a sandwich instead of mayo, olives. I'm a health coach, so if you want recipe info please message me. Mini meals 5-6 times a day may be the way to go rather than 3 larger meals.