Some of the best and safest foods for people with Diabetes or blood sugar issues to eat are cauliflower, mushrooms, onions, and greens because they have a lot of nutrition and don't significantly raise blood glucose. You can have healthy, delicious meals that fill you up without grains or meat.
It's easy and delicious to make meals using these vegetables all together. Cook them in some water until they're soft (Add the greens at the last minute or leave them raw to retain more of their natural nutrition). Add some protein like tempeh (see picture below), tofu, or white beans. You can add healthy flavor in different ways: Make a sauce out of organic, reduced sodium tamari and some garlic and cinnamon powder. Or use a little coconut oil with sea salt. If you can't have soy, add some coconut aminos for flavor.