La Shy: I think you’re trying too hard, and over-complicating things. Dr Mosley’s book will give you a fair idea of portion sizes in the recipes section, and much of the other information is in the book, for example the resistant starch: sorry, but seems fairly straightforward to me – you cook the stuff, let it go cold, stick it in the fridge/freezer till you need it, take out and reheat. Or not, if you’re having it cold! No, unless you’re going to start making your own bread and pasta, you’re not going to eliminate all processed foods, but as long as you buy your meat and fish fresh (though I seem to remember tinned tuna is OK!), ditto fruit and veg, you’re well on the way. And bear in mind, yoghurt and sauerkraut are processed foods, too! But don’t try to quantify everything, an ounce of this and a couple of ounces of that are going to drive you nuts – chill, eat as much as seems good to you at the time, and if you’re still bothered about portion sizes, weigh everything and get a calorie count for a few days or a week – terminally dull, but by the end of a week, you’ll have a very good idea of how many calories each individual food serving comes to. Alternatively, use some sort of measure – I use American cup measures – and once you work out the weight and calorie count of each type of food for a given cup size, you’re sorted.
The Japanese, incidentally, advocate 30 different types of food daily. Sounds horrendous, but isn’t really, as every ingredient counts as a food type, so (for example) a veg soup might be: oil, stock, carrot, cabbage, swede, peas, potato, barley: 8 food types, more if you count the bits and bobs that went into the stock.