OP This is really in answer to the poster who suggested that you ate 'normal' (= mostly highly processed) food rather than the real thing. It's not particularly a slimming way of eating but it is filling and - most of all - nutritious . You might find you lose weight on it anyway. I'm only making these suggestions to try to show that healthy eating need not be some sort of punishment. Or difficult. And ,if cost is an issue, it's cheaper than many processed ready meals or takeaways.
Breakfast - what about cottage cheese and an apple; oatcakes or seedy-bread toast and crunchy peanut butter; carrot sticks and hummus; a plain 2-egg omelette -- I think this is nicer cold - plus mushrooms or a few tomatoes if feeling hungry; sliced cheese (eg emmenthal) and raw pepper strips; scrambled eggs with mushrooms or a few bits of smoked salmon (really cheap if purchased as offcuts; you can buy them in bulk online) ... lots of possibilities; think of breakfasts in continental hotels that cater for local people rather than only British visitors. Even home-made wholemeal pancakes - very little flour, lots of eggs and milk - with lemon juice and fresh or stewed fruit - no extra sugar, if you have the time.
DH often has porridge with berries and then perhaps a pear or a kiwi or an orange. You could do overnight oats and berries. Or yoghurt and berries with (not too sweet) granola or toasted chopped nuts....
Lunch - homemade soup - minestrone, mixed veg, lentil, leek, french onion sort of thing, butter bean etc etc - all very cheap and easy and filling- plus perhaps a bit of cheese on the side if you have not had cheese for breakfast. Or with yoghurt or grated cheese mixed in. Or with some cold meat. This is usually our winter option.
In summer (and indeed today) - lots and lots of green leaves, grated carrot, olives, avocado and olive oil/vinegar dressing. If you eat meat, you could add some cold chicken or cold roast meat. Or you could have hard-boiled egg mayonnaise (if no eggs at breakfast) plus salad as above, minus dressing, of course. You can add as many other veg as you like, within reason: little tomatoes, watercress, celery, chicory, spring onions, radishes, fennel, rocket, finely shredded hard cabbage... Or (if you eat fish) 'winter' salad (chopped apple plus walnuts or capers or gherkins plus mayo and lemonjuice and lots of chopped celery or fennel) with cold kippers or smoked mackerel or safely-fished tuna or rollmop-type herrings, with lots and lots of plain lettuce or other green leaves. Oily fish is v. good for you.
Supper: Today we will have cauliflower cheese (quite rich; lots of feta and vegetarian 'parmesan' and mustard in sauce, home made: olive oil, wholemeal flour, milk and cheese as above) with plain lightly-boiled carrots and lots of steamed spring greens. (This is perhaps an odd taste - I really like greens; they are also excellent shredded and stir-fried with garlic, soy sauce, ginger and spring onions). DH will also have some celeriac and swede mash (very easy to make at home) , and a couple of sausages. But you could have roast or grilled meat or fish or chicken plus two or three different vegetables. Or baked veg dishes. Or a casserole . Or a stir-fry. Or a quick frizzled steak (if you like - often cheaper than a nasty 'plastic' ready meal.) You might find that you can also eat a baked potato or a few stamed new potatoes as well; we all have different metabolisms.
Please don't get me wrong - I like curry and pizza and I have a Chinese friend who is a fabulous cook, but the takeaway versions of all these wonderful ancient cusines are not often very healthy. They are a fast option, and fine for a treat, but not the long-term answer.
If you want 'pudding', a little bit of dark (70% and over ) chocolate plus a small handful of almonds or hazelnuts, or a few grapes, or a satsuma or two....Or berries and yoghurt, or cooked fruit and real cream. Cold stewed dried apricots, or cold stewed apples plus cinnamon, for example, whizzed up then blended with a little whipped cream are so quick to cook and taste really luxurious. Leave individual portions to chill in little bowls in the fridge. If liked, top with a few fresh berries, grated dark chocolate or flaked almonds.
All real food All really tasty.. None, except DH's sausages and the smoked fish, processed. And, as earlier posters have said, snacks are not really necessary. I'm old; we never used to have them. As a child, just home from school, we were offered bread and jam or perhaps a couple of plain biscuits (digestive or similar) plus a drink of milk or very dilute squash. Crisps of all kinds and snack /'protein' bars (however packaged) etc were virtually unknown. As a young adult at work, snacks - except perhaps for a surreptitious apple - simply did not exist. We ate salads or sandwiches for lunch. Then later we had dinner/supper. We survived.
On Sunday afternoons there was cake. Home made. Really good. But once it was gone, it was gone. Please believe me; I'm not preaching. Compared with today, in the past it was so much EASIER to eat well. The current processed and fast-food industries have so much to answer for.