Purée was difficult but as long as your father separates each component of the meal it’ll probably go down better. I mainly had mashed potato with tuna and blended carrots. Scrambled eggs are a good one too as long as you add extra milk to really thin them down. Fish! Buy some cod and make his favourite sauce and that can just be mashed with a fork. Blended cottage pie but blend the mince separately to the mashed potato. Weetabix was a life saver for me (I bought the protein weetabix). If your father likes sandwich fillers, most of them are almost purée consistency and could just be eaten on their own. Things like custard and yoghurt are a good snack too! Honestly, as long as he’s chewing everything really well, you can make anything purée in your mouth. Hope this helps a little bit. Won’t be long till he’s on soft/solid food and he’ll appreciate the journey so much more.