Hmm, perhaps make a few “crackers” that are purely parmesan. (Have you seen those?You make them by grating parmesan onto a greased or paper lined tray, and baking just till it melts together, then cutting into little crackers while warm. The cheese sets into quite neat little crackers with no carb.) Then decorate the cracker with a couple of slices of apple on top. It’s a biscuit, it’s flavourful, and the apple isn’t apple as he pictures it, but a topping. Pear would work too.
As for it not going with the tea, I can’t comment, as I have never liked tea (or coffee), but tea has a bit of bitterness, which I guess the sweetness of the biscuit offsets, so maybe omitting the cuppa as suggested by Janet is a good idea! 😉
He might get more used to the idea of apple with the tea after having a little dressed up with a cracker or a bit of cheese rather than thinking of it as a whole apple.