@newtowelsplease Agreed, it does become more difficult with teenagers. I think it's a case of changing what you can and trying to find the best, minimally processed, even if not perfect. Could you get coke with Stevia instead? Why not just coke with sugar? I still bought crisps for my teens but mostly bought ready salted where the ingredients are just potato, oil and salt. Granted, I realise the oils not good.
Habits seem to stick a bit. DD at uni mostly cooks from scratch and has a non cereal, non bread breakfast. She makes a lot of omelettes and crepes. Of course she'll be eating lots of crap snack foods too but at least her meals are not ultra processed too.
@Grumpyfroghats We mostly cut out oven chips and have potato wedges or chippy potatoes, which is basically like you said, potatoes chopped small, put in the oven with oil and salt. We don't even peel them.
If we have oven chips in, they are the so called naked ones, which are just oil and potatoes. Again, crap oil, but at least no other crap in them if there's no potatoes in and no time to chop.
Someone does make wraps without the crap but they're comparatively expensive to the others. £2 for 4 last time I bought them, so likely more than that now.