(I'm T2) and I eat a lower carb higher/full fat diet based on about 100-150g of carbs a day. I find this is best for my BGs and weight management. From what I've read here, it's also an approach that can be good for T1s.
For breakfast I have a good sized bowl of full fat greek natural yoghurt, with about 3/4 cup of berries, 2 tablespoons of ground flaxseed, and a splash of double cream. I find this provides enough calories and a sense of satisfaction (from the added fat) that keeps me going for hours. If I have time, alternatively I have 2 large scrambled eggs with cream or cheese, mushrooms, and bacon or low carb sausages. Also very filling and satisfying, while low carb.
For lunch or dinner I have a big plate of homemade coleslaw or lettuce-based salad with grated cheese or shredded chicken or tinned salmon. Or a piece of meat/chicken/fish with steamed veges. For snacks I eat cheese or a boiled egg, sometimes with salami, ham or bacon.
Just thought I'd share my example and that it's possible to eat enough to feel full without spiking your blood sugars by too much.