I often have a healthy (check the nutrition label re sugar, Sodium and that it hasn't got added sugars, or very little) Granola that has nuts/seeds as well as a lot of wholegrains in it, mixed with a double-protein Greek Yoghurt, and a banana, or a higher fibre, or wholegrain toast (mine is lower carb but double protein) with avocado and a sprinkle of lemon pepper, along with a a banana. If you like peanut butter, that is also a good protein and healthy fat to go on your toast. Baked Beans on toast is another quick/easy breakfast.
My lunch always has fruit in it, and often tomato and/or cucumber/beetroot for the main part of it. I will have some ham or a little lean roast pork, and if I am still hungry I might eat some Greek Yoghurt. I might have a little tin of salmon instead of the ham or pork, or if I am out I will often take some cut up pear and apple, and sometimes some other piece of fruit, and have a healthy protein nut bar as well.
I bulk cook a healthy very large oblong pizza and when cold cut into serves and free-flow freeze them. Sometimes I will have a piece for lunch, often with a salad or if it is winter, a mug of home-made soup (also bulk cooked and frozen individually) which is loaded with veggies and pulses, and often has a little meat in it as well. I occasionally have a few hard boiled eggs in the fridge for either a healthy snack or as part of my meal.
I bulk cook casseroles and I single serve freeze them, too. In the winter I might have one of them on toast for lunch, altho' I mainly have them to go with my cooked veggies at night.
Food for thought - hope you find something that takes your fancy.
We have had a number of articles over the years that contain some great meal suggestions. Click on the magnifying glass (upper right) and search for meal ideas. Here are a few I found that you might like: