Hay my lil man is the same!!! He has cm intolreance and we started weaning 4 months ago now!! We started with baby rice a couple of times a day just teeny tiny amounts to get him used to it and then until he was 6 months he just had veg purees. But that was anything, tomatoes, carrots, peas everything and anything. At 6 nmonths was where it gets difficult because thye can pretty much eat anything but you start to realise just how much food cm is in and what of our food its in. Lasagne (the sauce) mash in shepherds pies.....its just everywhere. However by that point we bought milk free cheese and milk free marge (vitalite) and we all use it now!! We are seeing a dietician next week or the week after about how to supplement the lack of cm in his diet with other foods!! If you're cooking ur own food just remember to think about it lol!! Cows milk is in a lot of food!!! If your doing jars then check the labels religously.....we do give jars sometimes and my word you just have to keep checking!! Oh and for mash and baby rices and cereals just use there own milk!!!!!!
/ood luck!!! N if you need anything pm me I might be able to help (might not lol) x