TheCat:
I am not sure if there is any food you can't eat. Presuming there is not, and you are not following a particular diet such as no carb:
Protein
Eggs
Plain full fat real yogurt
Milk,
Cottage Cheese
Feta
Cheddar (for small snacks at a time)
Halloumi
Tofu
Quorn (chicken pieces, mince, sausages can all be used in recipes)
Seitan
Pulses, in tins or cartons to be quick, these have some carbohydrate too:
lentils, black beans, chick peas any.....
Houmous
Brown rice protein powder (to boost protein by mixing into somethings if you have no time)
Hemp Protein powder (the same)
Ground Linseeds
Olive oil/walnut oil/hemp oil
Large bags of nuts say almonds (to eat as part of snacks, say 10 per snack)
Chicken, other meats if you eat them
FIsh, including tinned tuna or sardines (massive protein)
Complex, fibre filled carbohydrates
Real porridge oats or quinoa flakes (not those ready pots ideally)
Whole grain Brown rice
Whole grain brown bread or rye bread (if you are not gluten intolerant and do not get puffed up with gluten)
Ryvitta
Oat cakes (both as above if you are not gluten intolerant)
Any leafy vegetables - lots
cauliflower
Courgettes
sweet potatoes
Small potatoes with skin (don't eat loads)
Lemons (large packs)
Berries (frozen are cheap and convenient)
Small apples tangerines grapes (in moderation)
(PIneapple, ripe bananas, loads of grapes will be a bit too sugary)
Drinks
Herb teas so you do not have to have too much caffeine
Water filter so lots of water tastes nice
(longing for alcohol at the end of the day s something on its own, may be hunger speaking)
Try to be a little aware to see if you can approach getting 60 -70 grams of protein per day. Vegetables can have it too like spinach and broccoli have a lot, even a slice of good bread does. Try to see the food as special and delicious and something to add not something to cause anxiety. So if you want a little white rice and a few chips don't get stressed over it so long as you have predominantly lots of leafy vegetables and enough protein. (At least half a plate worth of leafy vegetables, just over a quarter roughly of protein)
Breakfast examples:
Two eggs and a piece of brown bread toast.
A small bowl of porridge made (with milk?) and with a tablespoon of seeds
(You can make your own raw mixture the night before and leave it in the fridge)
Yogurt with two tablespoons of protein powder (Hemp is a slightly raw taste, brown rice less so) mashed berries and some linseed.
Snack examples:
A handful of nuts, possible with a small tangerine or small apple.
Houmous on ryvitta or an oat cake
A tablespoon of Cottage cheese on the same
Some protein powder shaken up in some water and a little bit of fruit juice
Worst case scenario a high protein low sugar/sweetener bar like Atkins might make (but a lot of those commercially made bars are very fatty, very sugary including 'health' ones) or a "Bounce" ball
Some protein powder shaken up in some water and a little bit of fruit juice
At cafes - something less sugary to drink like plain coffee small or medium with some milk, rather than the syrups or chai latter etc
and many now sell plain nuts (ideally plain as raisins look small but add a lot more sugar) An apple. A sandwich. Some cafes now have high protein small meals like two hard boiled eggs, or endame beans,)
Lunch :
I am not sure if you are out at work;
Bought sandwiches may be more bread and spread than protein so check.
Could you make something to take?
Ready made soup, like Covent Garden you can bump up with half a tin of lentils per serving)
A tin of lentils/other olive oil and lemon juice, salt and pepper.
An omelette and vegetables (you could take a pice of two egg omelette cold) Cold vegetarian sausages
A piece of cheddar and a small apple
Cottage cheese and two green pr red pepper halves
An avocado with olive oil and lemon juice, salt and pepper
At home
a tin of sardines on a piece of toast with
salad;
tea
Have another snack and a hot drink
Dinner
This could be anything just following having a protein and vegetables as the main thing with a little complex carbohydrate (or white if you want it very much)
Puddings
Yogurt with some fruit
If you long for a treat, if you can wait to have it after your protein dinner,
it won't have such a crash then crave effect as if you have it as a snack alone when you are already ravenous. Ian Marber says try to have 80% of the high nutrient food. If you find you occasionally have a bit of something else that is not something to get upset about.
If you eat like this your blood sugar swings and cravings should calm down.
YOu should find you have good energy and stop feeling hungry.
Every now and then there are some people who find it easier to never have anything like rice or potatoes ever at all rather than to have some. Most people seem to get on best by having a bit though.
Ian Marber takes this more general approach I have outlined above.
Michael Mosely is very low carb but that is for people with diabetes
Joseph Collala has no sugar/carbs at all but vegetables and protein