I added a teaspoon of vegetable broth powder to the purple-tinted water the broccoli got cooked in.
Hey presto! A low-calorie soup(ish), only 12 cals, ready in 3 mins.
If you wanted it to fill you up for longer than five minutes you could always add some chicken and/or noodles. It was meant to be lunch but turned into a starter with more to follow. After all that digging my stomach easily won the battle it briefly had with my brain.