Cauliflower Soup, my recipe

In an effort to add more vegetables to our diet (above 5-6), yesterday I made this delicious soup and there's not a drop left! Amounts are guesses the way our grandmothers did it.

Half a quart of chicken broth/vegetable broth (I had both on hand so mixed them)
Half a head of cauliflower (could be more or less, but it's what I had)
About 1/4 cup of chopped onion (could be more)
One large white potato cut into pieces (this is for thickening the soup, so don't use red unless you want runny soup), but it also serves, in my mind, as a vegetable.

Tender cook this and run through a blender. Add some Half n half. Again, I eye-balled this.

Because cauliflower is rather bland, I added just a smidgen of hot mustard, and I think that's what did it. Not enough to taste it, but it did give it some zip.

It was a cool, spring day, so it was just perfect. My side dish was sliced cucumbers and big giant strawberries, so that was 5 fruits/veggies for one meal.

Most of the recipes I scanned add cheese, but that's just more calories and this was very hardy and delicious without it.