hello jojo. it's a devastating diagnosis isn't it? my son (now 26) was diagnosed at 10 years old. i can't give you any recipes as i didn't do it that way, just fed him a good, healthy diet. the main thing we did was cut out sugary drinks, puddings, and sweets. he ate a lot of yoghurt for dessert, lots of potatoes (chips, mash, roast) for the carbs. and he loved meat too. so i found roast dinners were a great meal for him, along with burger and chips, cottage pie. he was allowed a small amount of chocolate after his meal to satisfy his sweet tooth.
he's a big, strapping 6ft 5ins young man now, went off to university for 4 years and now lives and works 300 miles away.
i found it took me about 2 years to come to terms with it, and stop grieving. there's so much to take in isn't there? you'll get there in the end. ask to be put in touch with other mum's in the same situation, it really is a great help.
best of luck.