Just some suggestions off the top of this aged head:
If you like eggs, try omelettes with cheese/spinach/smoked salmon/mushrooms.
Oily fish will give you protein but few carbs. A prawn cocktail is low carb and shell fish is low carb too.
Home made veggy based soups - lots of possibilities. I've just enjoyed broccoli and stilton. And I also enjoy a chicken and leek (plus other veg) soup.
Add a FEW berries (rasps/strawberries or a few blueberries to your low sugar/carb jellies. Double cream with the jelly will help slow glucose uptake.
Salads - so many options but a good dressing helps. My wife makes wonderful salad dressing using olive oil, vinegar (malt, cider or balsamic) and grainy mustard. Salad veg can include rocket, lettuce, grated carrot, sliced cucumber, baby tomatoes halved, spring onion and if you fancy some thin slices of beetroot marinated in oil, vinegar and garlic. And of course avocado.