Hi Tofa,
Welcome on board. Oats are ok if unprocessed, so rolled oats or steel-cut oats are fine, porridge oats are not. Porridge oats are processed and not advisable, they are the instant ones that you add water or milk to and boil and serve within 20mins. Rolled oats need soaked overnight, they way my grandmother used to make porridge.
There is a list in MM’s book – sadly I have a Kindle version that does not give pages so I can’t direct you to a page, but it is chapter 6, about 6 pages into the chapter under the section The “M Plan”, then 3 pages on in that section, a table of ‘The M Plan – what to eat to control your weight’ and that itemises what to eat and what to avoid.
Brown rice is ok, but I don’t think red rice is as it does not have the extra fibre. Wild rice is ok. From memory — the book says occasionally eaten.
For M Plan, you can try quinoa, bulgar, buckwheat (I really like this as it is nutty and a lot of texture), whole grain barley instead of rice.
All pasta is off the menu, brown has a negligible amount of extra fibre so still too starchy.
For breakfast, I used to the muesli in the 5:2 book which used oats and oat bran along with 100ml skimmed yogurt, ground almonds, seeds and a few blueberries or rasps. I adapted that to 60ml full fat yogurt, 30g blueberries or rasps, then 3gm each or flax seeds, pumpkin seeds, sunflower seeds and 3 almonds. I am as full with the new full fat version as I was with the older version. On the 5:2 you could add in some ground almonds to the mix if you need more.
If you go through the recipes at the back, you can pretty much use them all for the ‘5’ days and from them you can get an idea of portions.
good luck.