Hi, I made up my own meal plan. I base every meal around one or more protein sources. In my case this is a choice of fish, cheese, eggs, Quorn, tofu, nuts and seeds. I also count pulses like lentils and beans as protein sources even though they are also sources of carbohydrate. I then add in vege, mostly above ground, and sources of healthy fats like full-fat plain yoghurt, olive oil, butter and avocado. I eat a lot of protein to keep up active muscle tissue as sarcopenia, loss of muscle, is an increasing problem in older people. Protein and fats both provide energy and technically carbohydrates are not required at all. I sure others will be along shortly with links to recipes e.g. the diet doctor website.
For example today I had a slice of low carb toast topped with trout pate for breakfast, celeriac and leek soup with cheese for lunch and I'm making aromatic Quorn mince for tea which I shall have with plain yogurt. And while I'm waiting for it to cook I'll probably have way too many cashews!