I think everyone does it differently. Lots of people stick to this 100% in the week! eat what they want at weekend, other people add in something like toast or porridge occasionally, other people fall off the wagon, eat more and more carbs and, er, pile the weight back on. Just beware of carb creep and binges.
Good day here. Greek yogurt for breakfast, fish curry for lunch, nuts for tea, hamburger for supper, plus lots of veg.