I just made blue cheese zoodles - 300g courgettes, 50g cream cheese, 25g blue cheese just chucked in a pan together and heated. Absolutely delicious, huge filling plateful, 267 calories 5.4g carbs!
The courgette is a marvelous vegetable!
I'll have to try your soup too - love a nice veggie soup. And appetite is exactly that way - I think they say it takes 40 minutes after you've hit satiety for your stomach to let your brain know it's full. I'm a big advocate of eating slowly. A little protein and fat with each meal also helps with full feelings.