DH has what has so-far been diagnosed as severe post-viral IBS, though tests are ongoing. He's on a low-FODMAP diet which restricts pulses, certain nuts, gluten, apples, pears and stoned fruit, among other things and, through a process of trial and error, has also cut out caffeine, fatty foods, lactose (though low lactose hard cheese and lactofree products seem to be OK and he does tolerate a bit of butter) and eggs. He's mostly living on porridge made with water, low fat fish or meat with rice and mediterranean-style veg.
He's losing weight at a rather alarming rate and is having further tests to rule out anything more sinister (he's had a colonoscopy, stool samples, endless blood tests already). Assuming it's "just" IBS though, does anyone have any suggestions for snacks or lunch items we can make to get more calories into him? Sugar is OK in smallish quantities but high fat and dairy (except hard cheese and lacto-free products) make his IBS worse. I was going to attempt to make some brownies and flapjacks but the sugar and butter won't be brilliant for him. I think most nuts are OK but not his favourite cashews and pistachios.
Many thanks for any ideas. Is horrible to see him wasting away.