If you make things too complicated it is difficult to sustain long term, with diabetes that is the important thing. When you buy something from the supermarket check the number of portions that it is supposed to give and mark them off before you start. I stick to three meals each day because that works for me, others find two or one best, but there is no snacking between meals. Half of a cauliflower base pizza with a side salad, a couple of slices from a Gammon joint with mixed Mediterranean veg (peppers, courgettes, a little onion, tomatoes), a portion of soup for a light lunch, some cheese for dessert. I eat until I have had sufficient not until I feel stuffed which took a little learning. The important bit for me was keeping to the recommended portion size.