Breakfast gets harder as you go along sadly, it's way harder than other meals. I ended up having babybels and peanuts on some days!! There is a very low carb bread that works for some people - burgen soya and linseed - that's only 11g of carbs per slice and is seedy so slower releasing. I had that with whole earth no added sugar peanut butter some mornings. Also a couple of oatcakes with houmous worked for me.
lots of shops like EAT and pret do "protein pots"; you could mimic those - e.g. a hard boiled egg and spinach or avocado and egg.
With a bit more time I would have a big omelette or massive scrambled egg stuffed full of spinach, mushrooms, cheese, peppers, onions and pesto.
Lunch is hard as anything grab n go has carbs, so many carbs!! I recommend taking soup if you can (Tesco sells a lovely cully and sully mushroom soup that's only 8g of carbs in the entire pot - garnish with loads of cheese or sour cream or something!), salad and chicken or salmon too.
If you're in London there's a place called pilpel that does wonderful falafels - hardly any breadcrumb so they are only 5g of carbs each. I can have a pot of 5 with tahini and chilli sauce and a big salad or stir fried veg pot and my blood sugar doesn't spike at all.
You can still have pesto but on veg rather than pasta sadly! However you can get low carb noodles - check out Holland and Barrett.
Basically it's really really boring and you will end up eating a lot of the same things, sadly. But it's not for long. And you can be creative at night or when you go out. I ate so much cheese and other fatty stuff but actually lost weight because I wasn't having pasta or bread or potatoes or sweets with it!