Me!!!! I've converted!!!!
It was lockdown that did it. Work in a suburb and couldn't get my lunchtime fast food fix. Also I've taken a shorter lunch so don't have time to get changed, get my lunch, find parking etc, and I can't be bothered either.
So, as I'm lazy ( I have a cleaner, get my car valeted etc) I started off by getting the protein type microwave lunches that are about £2.50 - £4 in the supermarket. That with a can or bottle of something from home. It was easier to just add it to the supermarket shop, mildly healthier and hot food.
Then a few times I forgot (lazy), so I took leftovers.
Ive then since started on a minimal waste drive at home so leftover bread, take away, food gets taken. I keep a 6'paclnof water and snacks in my locker and I rarely buy lunch out, but it feels more like a waste of money on shit food rather than a treat.
I guess it's a case of wean yourself off of it. May be a few times a week on days when you feel you really can't take your own, or just make your own meal deal but buy the snacks in advance and take your sandwiches/wraps?
Also just get into the habit of looking at leftovers and decanting them after dinner in the evening, and getting used to strange combos. Half a portion of spag Bol, fruit and a yogurt for example.
You can do this!!!