My response a bit naff, sorry. I was out and on my phone.
I actually occasionally 'eat normally', but don't go mad. It means I might have a meal out and eat the carbs. Generally if its a meal of fish, veg, potatoes and I'll eat the potatoes or if it's a curry I'll have some Naan, not a whole one, popadoms and Bhajis. In a Chinese or That I might have some rice or noodles. On holiday on Portugal I was walking a lot and ate normally - pastel de nata from the shop where they originated, and meals of fish, veg and potatoes where I left nothing and a large cinnamon roll! I've been to Pizza Express and had a lasagne a few times. A plate of noodles in Wagamama (80g of carbs) is the highest, but a short walk afterward sent it down to the 3s. In my experience of this, BG goes up to around 8 and sometimes sit there for a bit before falling. Depends on the meal composition. It's very inconsistent, but the range my BG seems to stay in is quite narrow even when I do occasionally up the carbs.
I'm generally cautious and usually only indulge if I know I'm going to be getting a lot of exercise afterwards. I go to the pub every two weeks with some mates and drink beer and eat crisps - I've been doing this for years, and only did so when I wore a Libre sensor and saw that levels returned to normal afterwards.
I might occasionally have a burger, but no fries.
Today I had a full English and at the beans, a large hash brown and one slice of white bread (Which was disgusting.) I think I saw readings in the low 7s, which is fine. Might hang around there for a bit and then fall back. If it's around 8 at two hours that's fine a well, it means the composition of the meal is slowing down digestion or there's enough insulin hanging around to stop hyperglycaemia.
(I only do this because I've taken enough readings to know what the result will be.)