Obviously not if you're going to deep fry everything but we know that. A standard family menu at home.
A grab and go breakfast of cereal, porridge, toast, eggs or fruit and yogurt will be no more than 400 calories.
A sandwich lunch will be about 4/500 calories
A home cooked dinner based around lean protein, some carbs and veg will be about 500 provided you go easy on the oil and butter . Even an M&S beef lasagne is only 620
So, 3 meals a day = 1500 calories max. We don't need special products or cookery books.
We do need to stop with all the junk we eat and drink between meals. But we have to do that whether we foĺlow a diet book or buy diet products or not.