Really interesting thread! To answer your original question OP, I eat very little UPF. I also eat low carb (as it prevents me getting aching joints and a bloated stomach) but my ds (who is 20) eats more carbs than I do.
I don't usually eat breakfast, but if I did, it would probably be something like scrambled eggs with mushrooms or Greek yoghurt with berries. On the days I work I have an early start so I do take a small snack, (usually cubes of good quality cheese and cucumber slices) as I don't know what time I might get lunch.
My ds often has some leftover dinner from the night before for breakfast. Otherwise he might eat eggs on toast. We buy bread from our local bakers which make it on the premises, so this is probably less processed than supermarket bread but more processed than home made.
Lunch for me is usually some kind of salad, or maybe a cheese and vegetable omelette. Occasionally I might have soup. If I buy soup I choose one of the fresh cartons and check the ingredients carefully.
Dinner is always cooked from scratch, so various things. Tonight I'm making a chicken curry with some fresh veg on the side, and ds will also have some rice with it. Whatever we have always includes fresh veg, and I never buy jars of sauces, always make what we need.
The only tinned things I buy are tuna, tomatoes and occasionally something like red kidney beans. I do buy mayonnaise, but have found one from a local manufacturer which has a reasonable list of ingredients and tastes lovely. Expensive though!
As I eat low carb I don't have things like cakes, puddings etc. Ds doesn't eat much of this sort of stuff either, but sometimes I will make biscuits for him to enjoy as a snack.
When ds was growing up, I very much fed him food that was mostly made from scratch. That's not to say he never had UPF, and he certainly ate UPF at parties when he was a child. As an adult he now chooses to eat very little UPF and really enjoys eating fresh food and cooking from scratch.
@Rocketpants50 thank you for that link! I will definitely watch the programme.