I would probably cook 4 fish fingers, out of habit 'cos that's what I'd put on a fish finger sandwich!
I am trying to lose weight at the moment so chip amount would depend on what else I'd have had throughout the day, and I'd have had at least double the veg. If I wasn't trying to lose weight, that's an absolutely fine portion (with the extra veg).
But, we do eat big portions - I'm also a volume eater. Hence loads of veg. I dont really have an "I'm getting full" sensation until I'm stuffed due to childhood eating so struggle with portions and trying to fill myself up.
In fact, you've just unlocked a memory whereby I was at the lower end of my BMI and was eating a chicken and veg pie (with filo pastry) and half a plate of veg for lunch and someone said how do you eat so much? Was probably around 500-600 cals for the whole thing and was my main meal of the day.
I've always had people commenting on my weight and what I eat, so I sympathise. I grew up being told I had to eat everything on my plate (that I hadn't served and was too much) cos there were starving people abroad and then I had an aunt telling me that I looked like I had 2 bums because I had a belly. And then another aunt, when my daughter had an ice cream as a treat, saying "if she keeps eating like that, she'll be like a barrel". Actual fk them.